22 creedmoor
- Thread starter Subhunter2
- Start date
It definitely must make some sort of difference. What that difference is, is beyond me. The guy who did this barrel for me claims to have 10-15k rounds comparing gain twist in 6.5x47 and 25x47. The only thing he noticed was that it was more difficult to place the barrel order when the time came.
Bugholes also told me a very similar answer.
Take that info for what you will. I only have 120 rounds on it, obviously there is zero chance I could make any claim.
Surely there is someone who has noticed something, somewhere.
If it was legit better, everyone would go that direction, don't you think? Every company would be gain twist 5 groove radiused lands.
I had Manson build me several finish reamers, my gunsmith said that was all he needed.
I don’t know if better but Craddock Precision uses Bartlein gain twist and the 400 Mod BB
Hmmm they also sell 3x more rock creek barrels in their RTR line than the custom barts. These are button barrels too. I have had a mod400 6gt match barrel, the throat moves just as fast as my kreiger and hawkhill barrels. Wast of money.
I went out to shoot the 22cm some more and had some really odd stuff happen. I had about 150-175 rounds down the tube and it shot lights out with just about everything. Now I'm struggling to get 1 moa, and struggling to get 15fps SD....Not sure what gives. Barrel is clean, there was a minor carbon ring, nothing I would typically worry about. I've had far worse. Scrubbing that sucker out tonight.
The good load that shot at 3450 is gone, and the good one that was at 3250 is also gone. I tried between the 3250 and 3450 in .5 gr increments, not a single one would shoot. Seriously, 1-1.5" groups. Occasionally 2 would stack, but the other 3 of the grouping would be all over the place.
I've always shot it between .020 and .040 off the lands and it was great. Berger 80 VLDS. My CBTO is 2.025, and it has only changed about .001-.002 with a total of about 290 rounds through it now.
I even grabbed two different rifles, thinking i just could not shoot that day, and that was not the case. They hammered.
I did the usual, checked action torque, scope, muzzle device, etc...all good to go.
Maybe that thing shot lights out up until it was well broken in and sped up, then fell off a cliff? Never had this happen, but i also haven't shot this overbore either.. Typically i shoot 6cm,6.5cm 300prc, 300 norma.
Is it possible the bullet is just not shooting well in the barrel anymore? This is also my first go with VLDS, which I've heard can get finnicky, but i was happy from the get go because it just shot excellent, no matter the charge weight. It even shot great up to 3650 FPS which was crazy..
I have new brass to try aswell...I will add that I'm no expert reloader, however i feel like i do OK. Charges are within .02 gr + or -. Sizing on the fancy expensive A419 dies ( no i did not pay retail, i got them dirt cheap from a good friend getting out of reloading), SAC seating die, BR4 primers. I have to be missing something, its weird how it was just a light switch..flipped off and now it will not group.
Here’s a pic, soaking wet with c4.
The other thing i was considering was bad powder? I was using up my last 2 - 1LB containers, then switching to a new 8LB jug of 4350.
Thanks for any insight, most people on here are far better than i am on this stuff.
The good load that shot at 3450 is gone, and the good one that was at 3250 is also gone. I tried between the 3250 and 3450 in .5 gr increments, not a single one would shoot. Seriously, 1-1.5" groups. Occasionally 2 would stack, but the other 3 of the grouping would be all over the place.
I've always shot it between .020 and .040 off the lands and it was great. Berger 80 VLDS. My CBTO is 2.025, and it has only changed about .001-.002 with a total of about 290 rounds through it now.
I even grabbed two different rifles, thinking i just could not shoot that day, and that was not the case. They hammered.
I did the usual, checked action torque, scope, muzzle device, etc...all good to go.
Maybe that thing shot lights out up until it was well broken in and sped up, then fell off a cliff? Never had this happen, but i also haven't shot this overbore either.. Typically i shoot 6cm,6.5cm 300prc, 300 norma.
Is it possible the bullet is just not shooting well in the barrel anymore? This is also my first go with VLDS, which I've heard can get finnicky, but i was happy from the get go because it just shot excellent, no matter the charge weight. It even shot great up to 3650 FPS which was crazy..
I have new brass to try aswell...I will add that I'm no expert reloader, however i feel like i do OK. Charges are within .02 gr + or -. Sizing on the fancy expensive A419 dies ( no i did not pay retail, i got them dirt cheap from a good friend getting out of reloading), SAC seating die, BR4 primers. I have to be missing something, its weird how it was just a light switch..flipped off and now it will not group.
Here’s a pic, soaking wet with c4.
The other thing i was considering was bad powder? I was using up my last 2 - 1LB containers, then switching to a new 8LB jug of 4350.
Thanks for any insight, most people on here are far better than i am on this stuff.
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@Roadrace33
Are you using the same lot # of powder, primers, and bullets as before when the rifle shot lights out?
My first thought was a carbon ring or barrel fouling, but you are currently addressing that potential issue.
Scope bases, rings, action screws all tight? Have you tried a different scope?
Are you using the same lot # of powder, primers, and bullets as before when the rifle shot lights out?
My first thought was a carbon ring or barrel fouling, but you are currently addressing that potential issue.
Scope bases, rings, action screws all tight? Have you tried a different scope?
I have checked scope mount (Spuhr) and action screws. Did not check another scope. This is a brand new TT 7-35. Not that they are without issues, but I sincerely hope it does not have an issue.
Same lot of primers, same lot of bullets. Different lot of powder.
I did a really good clean on it. Will try a few of my regular charges tomorrow, with a new jug of 4350 and see what happens. A lot more copper than I anticipated pulled out of the barrel. Odd, because I cleaned it a good 4-5 times as normal. Nothing heavy, but few patches, few strokes of a brush after each shooting. Carbon ring looks much better.
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While some may disagree, if you were seeing velocities in the 3450+ range with H4350, I do think it may have just been too hot. Pushing an overbore cartridge like this is going to be tough to keep "in tune" if you are pushing pressure limits, the consistency just won't be there day to day.
Thanks, I do agree with this. However i am curious about the "too hot". How do you determine it? The lands have not eroded very much at all, if any. With a Hornady OAL tool, its within .001-.002 of how it was new. When its pushed around 3600-3650 i get heavy bolt lift, however in the 3400 range, bolt lift is completely normal.
3450 is very fast, and i do plan to tone it down to 3200 range. I'm embarrassed to say how dirty the bore was after letting c4 sit in there for about 8 hours. I'm fairly certain that this was the issue. After scrubbing the carbon ring, it is also so much better. Typically if i clean every 100-150 rounds, its more than enough.
I finally got some n555 to try, so that will be in the works as well to see how it goes.
For reference, here is how it shot with just about any load I threw at it 3300fps and above. It seemed to get tighter and tighter up to 3450-3500fps, then decline slowly. This pic is also with 20mph cross winds, so it was pretty awesome.
It was hard to not love these groups, and I stuck with it. Those are .36 white squares and .72 orange.
We will see how it groups tonight or tomorrow. The plan is to find a good group with the VLDS, then try the 85.5 hybrids. Night coyote season has been done for a while here, and I don’t hardly do any hunting of them in the summer.
It was hard to not love these groups, and I stuck with it. Those are .36 white squares and .72 orange.
We will see how it groups tonight or tomorrow. The plan is to find a good group with the VLDS, then try the 85.5 hybrids. Night coyote season has been done for a while here, and I don’t hardly do any hunting of them in the summer.
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