i have an older rem 721? (its in the safe don't make me go look it up)in 300 H&H that it "catches" when you chamber an unfired case just as you go to close the bolt and is damn near impossible to close the bolt on a reload. i rarely shoot it so never got into the problem real good. today i noticed on some new nosler cases, neck sized only to make the holes round, that upon extraction there is a small scrape on the shoulder and 2 longitudinal scratches towards the base just behind and close to the scrape. brushed the crap outta the bore w/a 12 gage brush but doesn't help. with RP brass the problem is less noticable. question is....would this be something a gunsmith of unknown skill (as in walk into a large gunstore and say here fix it) be able to hone/polish away w/out changing the ID of the chamber or is it a skilled task i need to research for the right guy. THANKS
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Gunsmithing bolt gun rough chamber
- Thread starter sergeant69
- Start date
Re: bolt gun rough chamber
Try polishing your feed rails(underside)on the reciever with a craytex wheel on your dremmal, THEN see it still sticks, thats your long scratches on the brass,
You may be good to go there...
Try polishing your feed rails(underside)on the reciever with a craytex wheel on your dremmal, THEN see it still sticks, thats your long scratches on the brass,
You may be good to go there...
Re: bolt gun rough chamber
does it when just dropping a rd in the chamber (not using mag/feedrails) too. gotta be chamber?
does it when just dropping a rd in the chamber (not using mag/feedrails) too. gotta be chamber?
Re: bolt gun rough chamber
i know this is gonna sound really stupid, but i hope in the long run they DON'T have to pull the bbl. i always like to bed and freefloat my hunting rifles, because i can, its fun, i like to do it, and it usually helps accuracy. in 1982 when i got it, i fully intended to do all that but wanted to see what some handloads could first. w/180 gr RN sierras over over 62.9 grs IMR4350 i got, most of the time, 3/4" moa and just never wanted to chance messing that up.
i know this is gonna sound really stupid, but i hope in the long run they DON'T have to pull the bbl. i always like to bed and freefloat my hunting rifles, because i can, its fun, i like to do it, and it usually helps accuracy. in 1982 when i got it, i fully intended to do all that but wanted to see what some handloads could first. w/180 gr RN sierras over over 62.9 grs IMR4350 i got, most of the time, 3/4" moa and just never wanted to chance messing that up.
Re: bolt gun rough chamber
Can you see anything on the shoulder or up towards the base in the chamber itself? From the muzzle end, push a patch til it gets to the throat, take a flashlight and eyeball if you see the mark on the chamber causing it..
Can you see anything on the shoulder or up towards the base in the chamber itself? From the muzzle end, push a patch til it gets to the throat, take a flashlight and eyeball if you see the mark on the chamber causing it..
Re: bolt gun rough chamber
This sounds like a sizing issue. Post a pic of the marks. Since the Remington doesn't have as much of and issue, that points to case/chamber dimensions.
This sounds like a sizing issue. Post a pic of the marks. Since the Remington doesn't have as much of and issue, that points to case/chamber dimensions.
Re: bolt gun rough chamber
will TRY and take/post a pic of an affected case tomorrow. where the hell is the BROWSE option so ican upload a pic from a camera. all i see is "using UBBCODE" below this box. stop laughing!! is it the "enter an image" box above? i hate these damn things.
will TRY and take/post a pic of an affected case tomorrow. where the hell is the BROWSE option so ican upload a pic from a camera. all i see is "using UBBCODE" below this box. stop laughing!! is it the "enter an image" box above? i hate these damn things.
Re: bolt gun rough chamber
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Badshot308</div><div class="ubbcode-body">You don't have to pull the barrel to polish a chamber. Has this gun chamber issue since you purchased it in 1982, or did something happen to to it since? </div></div>
since day one. its wierd cause you can chamber a reload and the bolt refuse to close, wait 5 seconds, wiggle the bolt and it closes fine. damn things possessed or something.
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: Badshot308</div><div class="ubbcode-body">You don't have to pull the barrel to polish a chamber. Has this gun chamber issue since you purchased it in 1982, or did something happen to to it since? </div></div>
since day one. its wierd cause you can chamber a reload and the bolt refuse to close, wait 5 seconds, wiggle the bolt and it closes fine. damn things possessed or something.
Re: bolt gun rough chamber
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: __JR__</div><div class="ubbcode-body">Can you see anything on the shoulder or up towards the base in the chamber itself? From the muzzle end, push a patch til it gets to the throat, take a flashlight and eyeball if you see the mark on the chamber causing it.. </div></div>
will do that tomorrow too.
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: __JR__</div><div class="ubbcode-body">Can you see anything on the shoulder or up towards the base in the chamber itself? From the muzzle end, push a patch til it gets to the throat, take a flashlight and eyeball if you see the mark on the chamber causing it.. </div></div>
will do that tomorrow too.
Re: bolt gun rough chamber
how the HELL do i post a pic? FAQ says there will be a FILE MANAGER on the FULL REPLY SCREEN. not on my full reply screen there ain't. unless...........
how the HELL do i post a pic? FAQ says there will be a FILE MANAGER on the FULL REPLY SCREEN. not on my full reply screen there ain't. unless...........
Re: bolt gun rough chamber
Here you go. http://www.snipershide.com/forum/ubbthreads.php?ubb=showflat&Number=39427&nt=9&page=1
Here you go. http://www.snipershide.com/forum/ubbthreads.php?ubb=showflat&Number=39427&nt=9&page=1
Re: bolt gun rough chamber
thanks. you young guys have no idea how it is to be 50 plus and have your grandkid say wanna see my Iwhatever do $#@^ whatever. i have been discussing chevy 350 4 bolt mains compression ratios at work and a 19 yr old said 'whats a carburator do"?
thanks. you young guys have no idea how it is to be 50 plus and have your grandkid say wanna see my Iwhatever do $#@^ whatever. i have been discussing chevy 350 4 bolt mains compression ratios at work and a 19 yr old said 'whats a carburator do"?
Re: bolt gun rough chamber
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: ykrvak</div><div class="ubbcode-body">Here you go. http://www.snipershide.com/forum/ubbthreads.php?ubb=showflat&Number=39427&nt=9&page=1 </div></div>
went to that link. thanks anyway, but i only have another 20 years or so to live and don't wanna spend it trying to figure out all that. the only buckets i use are the ones i use to make chum for catfishing. but i do appreciate the help! thanks
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: ykrvak</div><div class="ubbcode-body">Here you go. http://www.snipershide.com/forum/ubbthreads.php?ubb=showflat&Number=39427&nt=9&page=1 </div></div>
went to that link. thanks anyway, but i only have another 20 years or so to live and don't wanna spend it trying to figure out all that. the only buckets i use are the ones i use to make chum for catfishing. but i do appreciate the help! thanks
Re: bolt gun rough chamber
Well friend, I can tell you that without pictures we really cant give you a hand. If you would like you can send the pictures to my email, Ill get them up for ya. Ill PM my email to you.
Well friend, I can tell you that without pictures we really cant give you a hand. If you would like you can send the pictures to my email, Ill get them up for ya. Ill PM my email to you.
Re: bolt gun rough chamber
cool. preciate it. in the meantime i'm going to get a wooden dowel, say 3/8" dia, cut a slot in the end, put a strip of 12,000 grit sandpaper in the slot, a little JB bore cleaning compound on the paper, chuck the other end in a drill and at a slow speed try and polish the bore out. follow that with some flitz. BUT i am willing to listen to objections/alternate methods. thanks.
cool. preciate it. in the meantime i'm going to get a wooden dowel, say 3/8" dia, cut a slot in the end, put a strip of 12,000 grit sandpaper in the slot, a little JB bore cleaning compound on the paper, chuck the other end in a drill and at a slow speed try and polish the bore out. follow that with some flitz. BUT i am willing to listen to objections/alternate methods. thanks.
Re: bolt gun rough chamber
REMEMBER....you DO NOT want that chamber mirror smooth, its just like the cylinder in an engine. The cylinder walls need to be scored or the rings will not seal on them, same thing for your chamber, to a point, not quite like the engine example. But the point is they cant be a mirror.
Here is the one pic I was able to use of yours that you sent me.
REMEMBER....you DO NOT want that chamber mirror smooth, its just like the cylinder in an engine. The cylinder walls need to be scored or the rings will not seal on them, same thing for your chamber, to a point, not quite like the engine example. But the point is they cant be a mirror.
Here is the one pic I was able to use of yours that you sent me.
Re: bolt gun rough chamber
Anyway, you definitely have something in your chamber, before you get too crazy get a light, pull your bolt and look down into your chamber and let us know what you see. Then again that could also be from loading off of the magazine.
Were these rounds single fed or off the mag?
Anyway, you definitely have something in your chamber, before you get too crazy get a light, pull your bolt and look down into your chamber and let us know what you see. Then again that could also be from loading off of the magazine.
Were these rounds single fed or off the mag?
Re: bolt gun rough chamber
ok. that will be later today but i will do that b4 i try and polish it out. understand about the cylinder wall/chamber analogy. am only gonna try and polish where the problem area is. but...will take a look see first and let ya know. that will be later today though. thanks again
ok. that will be later today but i will do that b4 i try and polish it out. understand about the cylinder wall/chamber analogy. am only gonna try and polish where the problem area is. but...will take a look see first and let ya know. that will be later today though. thanks again
Re: bolt gun rough chamber
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: longrange****</div><div class="ubbcode-body">Anyway, you definitely have something in your chamber, before you get too crazy get a light, pull your bolt and look down into your chamber and let us know what you see. Then again that could also be from loading off of the magazine.
Were these rounds single fed or off the mag? </div></div>
this brass was dropped straight into the chamber. no feeding from the mag.
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: longrange****</div><div class="ubbcode-body">Anyway, you definitely have something in your chamber, before you get too crazy get a light, pull your bolt and look down into your chamber and let us know what you see. Then again that could also be from loading off of the magazine.
Were these rounds single fed or off the mag? </div></div>
this brass was dropped straight into the chamber. no feeding from the mag.
Re: bolt gun rough chamber
ok.......looked into the chamber as suggested. could see bottom of it a lot better than top but nothing to see. clean. fingers to big/short to feel around. next...?
ok.......looked into the chamber as suggested. could see bottom of it a lot better than top but nothing to see. clean. fingers to big/short to feel around. next...?
Re: bolt gun rough chamber
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: longrange****</div><div class="ubbcode-body">REMEMBER....you DO NOT want that chamber mirror smooth, its just like the cylinder in an engine. The cylinder walls need to be scored or the rings will not seal on them, same thing for your chamber, to a point, not quite like the engine example. But the point is they cant be a mirror.
</div></div>
And if they are a mirror bad things might happen. I've read that some guys polish their chambers to a high gloss finish, even to the point of polishing them with Flitz. I don't like to polish the chamber itself with anything finer than 320 grit sand paper with oil. The chamfer on the end of the chamber I polish to help smooth feeding but the chamber itself? Not so much, I don't need the liability headaches.
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: longrange****</div><div class="ubbcode-body">REMEMBER....you DO NOT want that chamber mirror smooth, its just like the cylinder in an engine. The cylinder walls need to be scored or the rings will not seal on them, same thing for your chamber, to a point, not quite like the engine example. But the point is they cant be a mirror.
</div></div>
And if they are a mirror bad things might happen. I've read that some guys polish their chambers to a high gloss finish, even to the point of polishing them with Flitz. I don't like to polish the chamber itself with anything finer than 320 grit sand paper with oil. The chamfer on the end of the chamber I polish to help smooth feeding but the chamber itself? Not so much, I don't need the liability headaches.
Re: bolt gun rough chamber
yea, i would only polish the part of the chamber relating to the shoulder forward to the neck where the rough spots are.
yea, i would only polish the part of the chamber relating to the shoulder forward to the neck where the rough spots are.
Re: bolt gun rough chamber
not yet but maybe by this afternoon. have been on another site getting opinions too. they range from using a wooden dowel w/ slits cut in it to hold fine grit paper to using fired brass threaded at the base and attached to a rod w/a mild abrasive paste on the case and turned slowly in a drill. my inclination is to try the fired case method using a little JB bore paste and oil and go slowly. i think this will cause as little potential damage as possible if it doesn't work. i am only going to put the abrasive on the shoulder where the burr seems to be. i understand not polishing the entire chamber.
not yet but maybe by this afternoon. have been on another site getting opinions too. they range from using a wooden dowel w/ slits cut in it to hold fine grit paper to using fired brass threaded at the base and attached to a rod w/a mild abrasive paste on the case and turned slowly in a drill. my inclination is to try the fired case method using a little JB bore paste and oil and go slowly. i think this will cause as little potential damage as possible if it doesn't work. i am only going to put the abrasive on the shoulder where the burr seems to be. i understand not polishing the entire chamber.
Re: bolt gun rough chamber
longrange....lookat the pic you posted for me. and thanks again. see the ring on em about a quarter of the way up? this is unfired, unsized etc brass straight out of the box. it has been chambered. however, ALL the nosler brass i have has it, even the unchambered ones. the RP doesn't. ???
longrange....lookat the pic you posted for me. and thanks again. see the ring on em about a quarter of the way up? this is unfired, unsized etc brass straight out of the box. it has been chambered. however, ALL the nosler brass i have has it, even the unchambered ones. the RP doesn't. ???
Re: bolt gun rough chamber
well hell project on hold for a week or so. had a dr appt. and gotta have eye surgery asap. when i get to the rifle will let ya know and THANKS for all the help and interest!!
well hell project on hold for a week or so. had a dr appt. and gotta have eye surgery asap. when i get to the rifle will let ya know and THANKS for all the help and interest!!
Re: bolt gun rough chamber
Wow, sorry to hear that you have to have surgery, sure hope everything goes ok for you. Keep us posted on your health.
As for the ring. Thats fine, its part of the manufacturing process, in fact if you were to cut one of the brass open you will see that is where the "web" begins and the thickness of the brass wall begins its thickening tapper. Some brass you can see it and some you cant. In fact if you want an example of this take a look at Lake City Military ammo or brass....there is a heat temper ring near the shoulder, all brass has this. Its just that some companies polish the brass to make it look purty......Its no big deal.
Wow, sorry to hear that you have to have surgery, sure hope everything goes ok for you. Keep us posted on your health.
As for the ring. Thats fine, its part of the manufacturing process, in fact if you were to cut one of the brass open you will see that is where the "web" begins and the thickness of the brass wall begins its thickening tapper. Some brass you can see it and some you cant. In fact if you want an example of this take a look at Lake City Military ammo or brass....there is a heat temper ring near the shoulder, all brass has this. Its just that some companies polish the brass to make it look purty......Its no big deal.
Re: bolt gun rough chamber
You and I are having the same problem. I thought my dies weren't resizing my brass enough. I was getting the same marks on my reloaded cases that you are. Clean the hell out of your bolt face and scrubb the chamber with a bronze brush. Put some hoppe's 9 on a tight fitting patch and twist it in your chamber until you get everything out of there. I did this to mine and the bolt will close but is still tight. There were no more marks on the brass shoulder or down the sided either. I think that we both have very tight chambers and only see this when using resized brass because it is at the upper end of SAMI specs, after it has been resized, and our chambers are probably at the lower end of SAMI dimensions. Factory stock gun that shoots in the .3's, I aint complaining.
You and I are having the same problem. I thought my dies weren't resizing my brass enough. I was getting the same marks on my reloaded cases that you are. Clean the hell out of your bolt face and scrubb the chamber with a bronze brush. Put some hoppe's 9 on a tight fitting patch and twist it in your chamber until you get everything out of there. I did this to mine and the bolt will close but is still tight. There were no more marks on the brass shoulder or down the sided either. I think that we both have very tight chambers and only see this when using resized brass because it is at the upper end of SAMI specs, after it has been resized, and our chambers are probably at the lower end of SAMI dimensions. Factory stock gun that shoots in the .3's, I aint complaining.
Re: bolt gun rough chamber
i had lasik in the 80's and went from 20/400 and 20/200 to 20/30. but lately having problems. eye dr sent me to an eye surgeon and both say left eye done wrong in the 80's. so tomorrow the lasik dr will "grind/shape" both to proper shape. says no reason not to expect 20/20 and then have to use reading glasses. have to qualify 2x a year and can't even see the damn sites w/dominant eye, much less the target. its funny cause i score in the upper 95% of the agency just guessing instead of aiming, using the AR's. handgun i hold w/right hand and use left eye. anyway...i'm sure this is just frikkin facinating to everyone!!! i will let ya know how the chamber shapes up when i can get to it. thanks again.
i had lasik in the 80's and went from 20/400 and 20/200 to 20/30. but lately having problems. eye dr sent me to an eye surgeon and both say left eye done wrong in the 80's. so tomorrow the lasik dr will "grind/shape" both to proper shape. says no reason not to expect 20/20 and then have to use reading glasses. have to qualify 2x a year and can't even see the damn sites w/dominant eye, much less the target. its funny cause i score in the upper 95% of the agency just guessing instead of aiming, using the AR's. handgun i hold w/right hand and use left eye. anyway...i'm sure this is just frikkin facinating to everyone!!! i will let ya know how the chamber shapes up when i can get to it. thanks again.
Re: bolt gun rough chamber
It may be that the lasic was not done wrong in the 80's...eyes do change shape over the years. Even extra fat in the orbit can move things around. Personally...I'd do one at a time. Shit happens. All that stuff is computer controlled...the doctor mostly just walks in the room to see if the machine is turned on. You ever hear of a computer malfunctioning? Happens. Infections, viral as well as bacterial, also happen. Try to keep one eye working until you are sure the re-operated eye is functioning correctly. JMHO
It may be that the lasic was not done wrong in the 80's...eyes do change shape over the years. Even extra fat in the orbit can move things around. Personally...I'd do one at a time. Shit happens. All that stuff is computer controlled...the doctor mostly just walks in the room to see if the machine is turned on. You ever hear of a computer malfunctioning? Happens. Infections, viral as well as bacterial, also happen. Try to keep one eye working until you are sure the re-operated eye is functioning correctly. JMHO
Re: bolt gun rough chamber
operation was a huge success. haven't seen this good since i wore coke bottle glasses as a kid. i can actually see the front site of a pistol now. and i mean see it clearly. and the target, at the same time. and i still have the non corrective antibiotic contacts on, to come off tomorrow. shoulda done it a lot sooner. i drilled and tapped a primer hole in a case and threaded on a rod and made a paste of JB and oil and ran it in a drill in the chamber. case looks like hell where it spun against the burr in the chamber as i expected it would but the problem is still the same. new cases dropped in the chamber still come out as b4. called a reputible gunsmith ( i hope) in san antonio and he said for around $50 he'll carefully lap out the burr or whatever it is. for that amt. i think i'm gonna let the experts do it. too good a gun for me to hack it.
operation was a huge success. haven't seen this good since i wore coke bottle glasses as a kid. i can actually see the front site of a pistol now. and i mean see it clearly. and the target, at the same time. and i still have the non corrective antibiotic contacts on, to come off tomorrow. shoulda done it a lot sooner. i drilled and tapped a primer hole in a case and threaded on a rod and made a paste of JB and oil and ran it in a drill in the chamber. case looks like hell where it spun against the burr in the chamber as i expected it would but the problem is still the same. new cases dropped in the chamber still come out as b4. called a reputible gunsmith ( i hope) in san antonio and he said for around $50 he'll carefully lap out the burr or whatever it is. for that amt. i think i'm gonna let the experts do it. too good a gun for me to hack it.
