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Allen Mag Shooters Group

 
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  #309  
Old 03-06-2010, 09:36 AM
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Re: Allen Mag Shooters Group

Quote:
Originally Posted by wadedc View Post
Gentlemen what is the expected barrel life of the 7mmAM vs .338AX for hunting. I could use it until it opened up to 1 MOA or better as most shots would be inside 700 yards. I am guessing the 7mmAM would burn up twice as fast? Are the heavy wildcat 7mm bullets available and how much do they cost?

Wade Carlson
When I first recieved my 7mm AM, I worked up a load with a 160 accubond, its jammed .006 into the lands. Once in a great while due to differences in idividual bullets I would end up with a bullet stuck in the throat while unloading a live round, that was in 2006, now at a round count of approx 460 rds. I've never readjusted my dies and I still occasionaly pull a bullet unloading a live round. never scoped the chamber but I'm thinking throat erosion is very minimal at this point.
Though the 338 will last longer, I'm very happy with my big 7, and satisfied with its longivity considering its intended purpose.

Yes wildcats are available, takes a while to get them, and with S&H I think mine were just over 81 cents each. will try them when the weather breaks.
RR
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  #310  
Old 03-06-2010, 11:46 AM
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Re: Allen Mag Shooters Group

Just for comparison.......

I shoot a 270 AM, 30" Lilja 3 groove. Have about 800+ round through it.

Seems to be in about the same shape as Ridgerunner's.

Still 1/4 MOA and 200 and expected increase at beyond 900.

When Kirby gets my new build completed I'll have him bore scope the 270 AM as I'm pretty sure the one I have has been ridden the hardest and put up the wettest of any of them. Should be a good data point.

Me thinks if these extreme cartridges are used as designed any of them will last a couple of life times. Good for the grand kids......
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  #311  
Old 07-19-2010, 10:09 PM
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Location: Saskatchewan, Canada
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Re: Allen Mag Shooters Group

Gentlemen
I just recieved my .338 AM from Kirby and it is beautiful. I am about to start loading ammo and am wondering if any of you have any pointers for loading this caliber? I plan to shoot 141gr H50 BMG with Federal Magnum primer and 300 SMK. I would be interested to hear what OAL you are using as I havent made an OAL gauge yet. I am assuming if it fits in the mag it won't be long enough to cause me any problems.

Wade
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  #312  
Old 07-20-2010, 06:46 AM
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Re: Allen Mag Shooters Group

Kirby can and will tell you the COL based upon the reamer he uses. If for some reason you do not wish to ask him then you should just soft seat bullets and find the lands that way. Record the distance to the lands and COL and you are ready to go. It takes about 30 minutes to get a good number.
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  #313  
Old 07-22-2010, 12:29 AM
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Join Date: Dec 2006
Location: Saskatchewan, Canada
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Re: Allen Mag Shooters Group

I think Kirby must be on holidays as I can't reach him. Do you know anyone who has a .338 AM I could ask advise from? I made my OAL gauge and with the 300 SMK I am 4.190" How far from the lands usually works the best with the SMK?

Wade Carlson
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  #314  
Old 07-22-2010, 10:41 PM
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Re: Allen Mag Shooters Group

No .338 AM shooter out there?

Wade
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  #315  
Old 07-22-2010, 11:36 PM
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Location: Blackfoot, Idaho
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Re: Allen Mag Shooters Group

Wade,

I don't shoot a 7mm AM but a 270 AM which should be at least similar to the 7 but probably worse.

I have 850 rounds through it. Had it bore scoped earlier this week. The smith said that "some" though not much cracking. Maybe 50% barrel life left.

If I remember correctly, 1200 rounds was an estimate before the AMs ever hit the street. AMs are supposed to be "huntin'" rifles not plinkers or for those with tinkeritus. Mine has been rode hard and put up wet. Still shots the original accuracy which was a bit better than APS's spec.

Use them they way they were intended by design and several generations can use one.

But........They are very hard "not" to shoot.
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