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Accuracy international axmc initial range report

captdan said:
I'm glad you gents brought this up. I just checked and indeed it's a 1x10 twist. ( indicated by moving my cleaning rod down the barrel, one turn on 10 inches). I don't see it indicated on the barrel anywhere, but I didn't remove the barrel for inspection.
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I think your golden!
 
FrankG said:
If it’s a US built gun it should have our barrel on it. We don’t make AI any 11 twist barrels.

What stamping/markings are on the barrel? Does it have British proof marks on it? If not....then I doubt 11 twist.

Later, Frank
Bartlein Barrels
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Thanks for the correction. I just looked up AI's website and figured they'd be the same twist in the USA as across the pond.

10" twist sounds more logical for sure.
 
captdan;

Thanks for confirming my question. Just what type of system does your rifle employ for reattach the barrel ?

Over the years so many have made the claim of a return to zero system but the only one I ever saw was in the T/C Contender, but that is a different system compared to a bolt gun. With bolt guns what I had observed was the rifle would need a round or two fired to make the barrel settle back in place, and even then those were not a true return to zero. Say if a guns return to zero at 100 yards was say a five shot group were the bullets would form a circular cluster with out any flyers, then the zero could be confirmed, but if the guns groups were a non circular cluster, return to zero would only be confirmed unlit the gun was shot at a father distance.
 
PRR1957 said:
captdan;

Thanks for confirming my question. Just what type of system does your rifle employ for reattach the barrel ?

Over the years so many have made the claim of a return to zero system but the only one I ever saw was in the T/C Contender, but that is a different system compared to a bolt gun. With bolt guns what I had observed was the rifle would need a round or two fired to make the barrel settle back in place, and even then those were not a true return to zero. Say if a guns return to zero at 100 yards was say a five shot group were the bullets would form a circular cluster with out any flyers, then the zero could be confirmed, but if the guns groups were a non circular cluster, return to zero would only be confirmed unlit the gun was shot at a father distance.
Click to expand...

The AI barrel screws out, back in and has torque screw that sets at 5.5 nm. You make a good point about zeros out past 100. My test was at 100. I'm getting 1/2 to 3/4 groups as I work on the best load for the gun. In my test I removed the barrel, installed it and got the same groups in the same place. ( point of aim). Would there be additional adjustments out past 100? I don't know, but I do know you'd be on paper.
 
I have seen switch barrel bolt rifles were they are the same as your rifle and it would depend on how close a tolerance was held regarding the threads on the receiver and barrel. The thing is there can not be a true zero tolerance with even today higher accuracy machining. The thread diameter on the barrel would have to be smaller then the receiver or the threads would gall an end up binding. The use of a anti galling copper or molybdenum based grease mite help mitigate any binding. Micro polishing of machined threads is difficult at best. I used to work for company that manufactured and sold AR15 uppers and the owners received from company that made an AR15 upper that the upper and forearm were machined as one piece. The barrel was secured in the receiver by clamping force with two cross screws with a relief slut under the front of the receiver. The barrel used a standard barrel extension. The claim was a switch barrel with an absolute return to zero. Upon are testing the claim did not prove true.

I have always wanted a true return to zero switch barrel system so as to be able to go on a hunt with one gun but in two calibers/cartridges. But as I stated earlier, the only system out there is the T/C.

P.S. In no way am I mocking your gun.
 
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PRR1957 said:
I have seen switch barrel bolt rifles were they are the same as your rifle and it would depend on how close a tolerance was held regarding the threads on the receiver and barrel. The thing is there can not be a true zero tolerance with even today higher accuracy machining. The thread diameter on the barrel would have to be smaller then the receiver or the threads would gall an end up binding. The use of a anti galling copper or molybdenum based grease mite help mitigate any binding. Micro polishing of machined threads is difficult at best. I used to work for company that manufactured and sold AR15 uppers and the owners received from company that made an AR15 upper that the upper and forearm were machined as one piece. The barrel was secured in the receiver by clamping force with two cross screws with a relief slut under the front of the receiver. The barrel used a standard barrel extension. The claim was a switch barrel with an absolute return to zero. Upon are testing the claim did not prove true.

I have always wanted a true return to zero switch barrel system so as to be able to go a hunt with one gun but in two calibers/cartridges. But as I stated earlier, the only system out there is the T/C.

P.S. In no way am I mocking your gun.
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I don't know anything about the TC. When I say repeatable I mean detach, and return with virtually the same zero within reason. Repeable barrels and scopes etc. If I can get the same point of aim I had when zeroed and shoot the same 1/2 " group on the same target as before to me that's repeatable. Doesn't matter if we are talking scopes, scope mounts or barrels.
 
captdan said:
I don't know anything about the TC. When I say repeatable I mean detach, and return with virtually the same zero within reason. Repeable barrels and scopes etc. If I can get the same point of aim I had when zeroed and shoot the same 1/2 " group on the same target as before to me that's repeatable. Doesn't matter if we are talking scopes, scope mounts or barrels.
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The Thompson Center Contender, G2, and Encore are single pistols and rifles that are break opens were the barrel can be swapped out for different barrels of different cartridges. The sight be it open or optic is mounted to the barrel so it remains zeroed.
 
PRR1957 said:
The Thompson Center Contender, G2, and Encore are single pistols and rifles that are break opens were the barrel can be swapped out for different barrels of different cartridges. The sight be it open or optic is mounted to the barrel so it remains zeroed.
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I'm aware of the TC contender, had one back on the 70's. Nice guns, but I'm talking about a rifle that retains zero. Basically apples and oranges.
 
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