Firing pin bushed
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Re: Firing pin bushed
What does bushing do? Just smooth and clean around the firing pin so its like new?
What does bushing do? Just smooth and clean around the firing pin so its like new?
Re: Firing pin bushed
Bushing gives less room for the primer to flow back into with hot loads. It involves milling a hole in the bolt face, then installing a bushing with a significantly smaller diameter firing pin hole. The FP tip is either turned down to match or the FP is replaced entirely.
Some question the need for this, others find it nearly mandatory. A lot depends on what cartridge you're shooting and how hot you load it.
Bushing gives less room for the primer to flow back into with hot loads. It involves milling a hole in the bolt face, then installing a bushing with a significantly smaller diameter firing pin hole. The FP tip is either turned down to match or the FP is replaced entirely.
Some question the need for this, others find it nearly mandatory. A lot depends on what cartridge you're shooting and how hot you load it.
Re: Firing pin bushed
Some new rifles will crater primers with medium pressure or lower loads due to poor pin fit or a bolt face that is not flat. I have one that does and needs to be done.
Some new rifles will crater primers with medium pressure or lower loads due to poor pin fit or a bolt face that is not flat. I have one that does and needs to be done.
Re: Firing pin bushed
With a lot of rounds on a bolt gun you will start to see elongated holes and primers trying to crawl in striker channel. I have bushed two of my own rifles and one for a friend. Saves a perfectly good bolt. I used tool steel on mine but did not harden it and turned it a slight taper and pressed it in with arbor press and faced it off. Worked like a champ.
Caution: doing this on a 03 bolt will take out a end mill. There are hard ! ! ! ! Wiped out a end mill on one I did.
With a lot of rounds on a bolt gun you will start to see elongated holes and primers trying to crawl in striker channel. I have bushed two of my own rifles and one for a friend. Saves a perfectly good bolt. I used tool steel on mine but did not harden it and turned it a slight taper and pressed it in with arbor press and faced it off. Worked like a champ.
Caution: doing this on a 03 bolt will take out a end mill. There are hard ! ! ! ! Wiped out a end mill on one I did.
Re: Firing pin bushed
What other smith's offer this service? Is Gre-Tan one of the better ones? I have a Savage that could probably benefit from having a bushing installed. Mild reloads and factory loads show cratered primers.
What other smith's offer this service? Is Gre-Tan one of the better ones? I have a Savage that could probably benefit from having a bushing installed. Mild reloads and factory loads show cratered primers.
Re: Firing pin bushed
Any smith should be able to do this. I have been needing to get this done on my Stiller....
Any smith should be able to do this. I have been needing to get this done on my Stiller....
Re: Firing pin bushed
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: ackleyfan</div><div class="ubbcode-body">I can't imagine your action needing it,since it's a custom!</div></div>
......what?
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: ackleyfan</div><div class="ubbcode-body">I can't imagine your action needing it,since it's a custom!</div></div>
......what?
Re: Firing pin bushed
My Stiller needs to be bushed. It has nothing to do with it being custom, it has to do with it being a 308 bolt face on a small primer, ie 6.5x47 and the like.
My Stiller needs to be bushed. It has nothing to do with it being custom, it has to do with it being a 308 bolt face on a small primer, ie 6.5x47 and the like.
Re: Firing pin bushed
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: ackleyfan</div><div class="ubbcode-body">Bacarrat,says his Stiiler needs to be bushed,and being a custom action It should not need to be bushed! Now a factory action is a different story!!IMHO </div></div>
Only if it was a perfect world. But it's not and my primers would crater with any load on any firing of the brass. I don't think the action is trued either... not according to the uneven wear on the bolt face.
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: ackleyfan</div><div class="ubbcode-body">Bacarrat,says his Stiiler needs to be bushed,and being a custom action It should not need to be bushed! Now a factory action is a different story!!IMHO </div></div>
Only if it was a perfect world. But it's not and my primers would crater with any load on any firing of the brass. I don't think the action is trued either... not according to the uneven wear on the bolt face.
Re: Firing pin bushed
Hard to say until I shoot for score in the next match. Had one hell of a 15 shot group at 600 yesterday on a steel target. One thing for sure is the primers are not cratered anymore.
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: mdesign</div><div class="ubbcode-body">The pictures tell the story. Did it change the way it performed? </div></div>
Hard to say until I shoot for score in the next match. Had one hell of a 15 shot group at 600 yesterday on a steel target. One thing for sure is the primers are not cratered anymore.
<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: mdesign</div><div class="ubbcode-body">The pictures tell the story. Did it change the way it performed? </div></div>
Re: Firing pin bushed
I have a Borden Timberline and a Alpine mag and the firing pins absolutley do not need bushing I believe they are .062 and a very tight fit not sure it has anything to do with a .308 bolt face and small primers but I understand when you run higher pressure loads with a small primer a .062 pin can stop primer blanking,why wouldn't a custom action maker run tighter tolerences on the the fire control system to eliminate cratering if your Stiller needs truing and a bushed pin maybe you need to look at the other Remington clones,the actions I have used don't need any further work done to them!
I have a Borden Timberline and a Alpine mag and the firing pins absolutley do not need bushing I believe they are .062 and a very tight fit not sure it has anything to do with a .308 bolt face and small primers but I understand when you run higher pressure loads with a small primer a .062 pin can stop primer blanking,why wouldn't a custom action maker run tighter tolerences on the the fire control system to eliminate cratering if your Stiller needs truing and a bushed pin maybe you need to look at the other Remington clones,the actions I have used don't need any further work done to them!
Re: Firing pin bushed
I just actually took it apart and measured... firing pin hole is at .080 and the firing pin is .075. But the protrusion is at .080. I believe it should be around .055 to .065? Surprised that I have never had a pierced primer.
I just actually took it apart and measured... firing pin hole is at .080 and the firing pin is .075. But the protrusion is at .080. I believe it should be around .055 to .065? Surprised that I have never had a pierced primer.
Re: Firing pin bushed
I curious if Surgeon,Defiance Machine,or Pierce actions are running there fire control systems a little tighter? we pay more for these clones to have tighter tolerences and a few improved features a Remington 700 don't have,so if your not receiving a better product why spend the $$$
I curious if Surgeon,Defiance Machine,or Pierce actions are running there fire control systems a little tighter? we pay more for these clones to have tighter tolerences and a few improved features a Remington 700 don't have,so if your not receiving a better product why spend the $$$
Re: Firing pin bushed
My Surgeon 591 and Borden Alpine do not blank primers. Any custom action that did would be sent back to the manufacturer for correction. You pay for tight tolerance in custom actions and blanking primers is sloppy.
My Surgeon 591 and Borden Alpine do not blank primers. Any custom action that did would be sent back to the manufacturer for correction. You pay for tight tolerance in custom actions and blanking primers is sloppy.
Re: Firing pin bushed
To answer your question, the Skunkworks STINKER and Model 911 (not Rem700 clones) actions (made by DEFIANCE) have bolts that are machined to guide the firing pin and there's no need to bush them.
To answer your question, the Skunkworks STINKER and Model 911 (not Rem700 clones) actions (made by DEFIANCE) have bolts that are machined to guide the firing pin and there's no need to bush them.
Re: Firing pin bushed
My PTG bolt on R700 leaves a cratered primer with 6x47L.I've been too lazy to send it off.
Steve
My PTG bolt on R700 leaves a cratered primer with 6x47L.I've been too lazy to send it off.
Steve
Re: Firing pin bushed
G,
That sounds hinky as hell.....
IMO, it'd rate a phonecall at the least. You able to get the speed you are looking for w/o cratering stuff?
G,
That sounds hinky as hell.....
IMO, it'd rate a phonecall at the least. You able to get the speed you are looking for w/o cratering stuff?
Re: Firing pin bushed
Speed isn't really a problem. I run more powder then most without running into pressures. Even with those little problems the gun still shoots lights out. I'll send the action back to have it checked when I rebarrel the rifle sometime next year.
Speed isn't really a problem. I run more powder then most without running into pressures. Even with those little problems the gun still shoots lights out. I'll send the action back to have it checked when I rebarrel the rifle sometime next year.
Re: Firing pin bushed
In my 6x47, the standard firing pin is just too big. The primer doesn't seem to flow back into the bolt, just around the oversized firing pin.
In my 6x47, the standard firing pin is just too big. The primer doesn't seem to flow back into the bolt, just around the oversized firing pin.
Re: Firing pin bushed
Our actions for the last year or so use a .068 pin in the predator and tac actions. These will not pierce unless something is terribly wrong or over pressure. It has a .0015 tight fit. Anyone telling you that a Stiller action needs truing or bushing if it is the .068 pin is likely looking for some extra cash.
Our actions for the last year or so use a .068 pin in the predator and tac actions. These will not pierce unless something is terribly wrong or over pressure. It has a .0015 tight fit. Anyone telling you that a Stiller action needs truing or bushing if it is the .068 pin is likely looking for some extra cash.
Re: Firing pin bushed
Very nice Shooter!
Greg built my .17Predator and gave my Seven action the Gre'tan "soup to nuts"...
Bushed pin, sleeved bolt, knob, etc, etc...
Very nice Shooter!
Greg built my .17Predator and gave my Seven action the Gre'tan "soup to nuts"...
Bushed pin, sleeved bolt, knob, etc, etc...
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