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a-maxes coming apart???

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Old 05-15-2006, 08:50 PM
Silver Member
Join Date: Aug 2005
Location: Houston,Mo
Posts: 178
a-maxes coming apart???

i went prariedog hunting over the weekend and noticed after 25 shots or so my bullets were never reaching the target i am shooting 75gr a-maxes at 3525fps out of a 22-243 with a 1x8twist .when i clean the rifle it shoots fine for just about 25 shots then they come apart again i dont let the barrel get hot and i usually clean it every 20 shots but was going to clean every 30 on this trip rifle shoots great otherwise its just like an alarm clock telling you to clean it

Is this normal for a fast twist .22?
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Old 05-15-2006, 09:11 PM
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Join Date: Jul 2002
Posts: 2,856
Re: a-maxes coming apart???

Not normal for a fast twist 22 but it is common with some barrels , usualy 3 grooves are harder on barrels than the 6 or 8 and if its a cheaper barrel like a Shaw or Adams and Bennit then the bore could be rough.
But if its not blowing them up untill it get dirty then its probably just the bore getting tight from copper buildup. I heard of a fella that was blowing up 105 A-maxes out of a 28" barreled 6mm-06Ai , if I'm not mistaken he tried moly coating and it helped but still lost one now and again , his barrel was a 3 groove Pac-Nor super match that had over 1000 rounds through it as a 6mmBR then was set back 2" and rechambered to 6mm-06Ai. I'm sure that after 1000 rounds going through it and that much cleaning that it should have been plenty broke in.

you might want to try the Sierra Match Kings in 77 and 80 gr or some Bergers. I have had cases that the 50gr Bergers would hold together when the 52gr A-maxes were blowing up.
Si Vis Pacem Parabellum
Molon Labe
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Old 05-15-2006, 09:11 PM
Platinum Member
Join Date: Sep 2004
Location: on the rifle range in Utah
Posts: 2,723
Re: a-maxes coming apart???

Blown up a few amaxes in my time. Carbon fouling and throat wear were major factors in my blowups.

Clean her good with a brush and some good solvent and then have it borescoped. There are two tools which help shooters dispell more myths and folklore than anything else in the world and one of those tools is a borescope!
Find it
Range it
Click it
Pull it
Dump it

If it's not far, it's boring.
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Old 05-16-2006, 07:14 AM
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Location: Fort Shaw, Montana
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Re: a-maxes coming apart???


The other is a rangefinder [img]/ubbthreads/images/graemlins/grin.gif[/img] [img]/ubbthreads/images/graemlins/grin.gif[/img]!!!

Kirby Allen
Kirby Allen(50)

Allen Precision Shooting
Home of the Allen Magnum, Allen Xpress and Allen Tactical Wildcats and the Painkiller Muzzle brakes.

Farther, Faster and Flatter then ever before.

Web Page: www.apsrifles.com

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Old 05-16-2006, 03:21 PM
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Join Date: Sep 2003
Posts: 347
Re: a-maxes coming apart???

I blew up more heavy 22 cals than I care to say. To put it short if your particular barrel is hard on bullets you are going to have to shy away from the a-max and any other bullet on a j-4 jacket. Try the 80 grain sierra, I have pushed them over 3750 in 8 twist barrels with no problems. The new nosler 80 grain bullets are supposed to be pretty tough to, don't buy the old one on j-4 jackets trust me they will come apart to. Fast twist 22 cals shooting heavy pills are great long range cartidges but you have to shoot pretty stout bullets.
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Old 05-16-2006, 04:22 PM
Silver Member
Join Date: Aug 2005
Location: Houston,Mo
Posts: 178
Re: a-maxes coming apart???

does it hurt anything as long as i clean it every 20 shots or so? the problem i have is i have about 500 of the 75 a-maxes left and i am going pdog hunting in 2 weeks and i dont have enough 80s to go and no load worked up for them anyway
we have a new place to shoot out to about 1400yds and i have read that the 80s dont open up very good at longer ranges and me and some of the guys i go with put in several dollars a peice and have a longest dog competition and it would be really bad to find a prariedog blood trail all the way to the hole and it would not count, its a sick feeling.

they already call my 22-243 " a long range gun for children "they razz me that it is to light and i sure dont need any more jokes about it not having enough power to kill a pdog they seem to think that 107gr sierra should be the smallest bullet ever used at long range and they dont need much of an excuse to start razzing a guy
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Old 05-16-2006, 05:19 PM
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Join Date: Dec 2001
Location: Long Island, New York
Posts: 2,110
Re: a-maxes coming apart???

I shoot the 75gr A-Max's all the time in my 22-243AI with a 28" Hart 8 twist bbl. I have never lost a single one and am getting 3,670 ft/sec at the muzzle.

Here is what I think helps (other than having a smooth bore and a good throat):

1. I load all of my bullets .010"-.015" INTO the rifling so that they dont slam into the lands when leaving the case.

2. I moly coat every bullet using the NECO kit. Moly coating bullets greatly reduces the stess on thin jackets that engraving causes. It also helps out with the 8 twist barrel which is harder on jackets than a 9 twist, which is all this bullet needs.

My overall best group shooting the 75gr A-Max moly bullet and 48.2gr RE22 was .625" ******and that was @ 600 yards. [img]/ubbthreads/images/graemlins/cool.gif[/img]

After nearly 1,000 rounds this barrel still does not dust A-Max bullets. It doesn't shoot as good as it did - but it doesn't dust bullets. [img]/ubbthreads/images/graemlins/grin.gif[/img]
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