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Accuracy International Picture Thread

Anyone have an idea on the writing on top of action ?

I just noticed it in this pic and will remove mount to see more

Also anyone know why there could be a possible check mark on top of bolt ?


Import marks before they started putting them on the side. Oak Ridge around that time.

The tick is probably just sharpie. Use isopropyl to wipe it off. Don’t think too hard into it…
 
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There have been several importers over the years. I dont know the list. Probably corresponds to the year of import.

Seems like a research project someone should look into and publish.

98 = Oak Ridge?
06 = Mingus
95 = Gunsite
 
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Another day another grind
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Had some fun at NRA Whittington with my AT-X a few weeks back. Shot out to 1900 yards and tried to connect at 2050 but ran out of elevation and the wind was going crazy. The round 1 mile target is 30" and we put a beating on it as you can see. Super happy with the AI and the experience at Whittington is highly recommended
 

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After 5 months of being a safe queen finally shot the AT today.

Not nice tiny groups to show off but the rifle is a joy to shoot. The mighty 308 is a little hard to keep on target for spotting impacts/misses, but considering it was was first few boxes of ammo through it, I felt it did alright.

View attachment 8743500View attachment 8743501
308 = GOD's caliber
 
I like shooting 308. I reload 308. And that’s the only way to push and maybe keep up with 6-6.5 mm lineups is to reload them. Other than that, factory ammo 308 suck at distance.
I don't mind the challenge at longer distances.

I don't reload, so caliber makes little difference in terms of available factory-loaded ammunition. I can get .308 factory-loaded that has comparable SDs to factory-loaded 6.5 CM. 6.5 CM is a better LR round due to higher BC bullets. Higher BC bullets in .308 would be great, but I can't see that happening.
 
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I have a question for the learned AI experts to help understand an issue with my AXMC using my new 300 WM bolt.

I configured the MC with the new bolt body, a new AI 300 PRC barrel, and a new magazine that has been tuned for 300 PRC (red follower). I went to zero it today. The rifle performed well in terms of accuracy. I had it zeroed in 3 shots. I used Hornady 300 PRC ammo with the 225-grain bullet. Before I began the process, I loaded the magazine, put the safety in the middle position, and cycled the bolt to check feeding and extraction. All of the rounds loaded and extracted perfectly. The bolt ran smoothly during chambering and extraction.

I then began the zeroing process. I fired one round, and was pleasantly surprised that the POI was minimally different than when shooting .308. Here is where the issue began. After firing, cycling the bolt required considerable force to open it fully. It went up to a point close to the top, but then required excessive force to lock it in the open position so I could extract the fired cartridge. I fired a total of 15 cartridges. All required extra effort to lock the bolt open, so it could extract the round. Some required more force than others.

I measured fired and unfired cartridges, and dimensionally, they were almost identical. The only measurement that was different was the diameter of the neck. An unfired case measured 0.338" while the fired case neck diameter measured 0.345". I don't know if that is normal since I don't reload.

Any thoughts?
 
I have a question for the learned AI experts to help understand an issue with my AXMC using my new 300 WM bolt.

I configured the MC with the new bolt body, a new AI 300 PRC barrel, and a new magazine that has been tuned for 300 PRC (red follower). I went to zero it today. The rifle performed well in terms of accuracy. I had it zeroed in 3 shots. I used Hornady 300 PRC ammo with the 225-grain bullet. Before I began the process, I loaded the magazine, put the safety in the middle position, and cycled the bolt to check feeding and extraction. All of the rounds loaded and extracted perfectly. The bolt ran smoothly during chambering and extraction.

I then began the zeroing process. I fired one round, and was pleasantly surprised that the POI was minimally different than when shooting .308. Here is where the issue began. After firing, cycling the bolt required considerable force to open it fully. It went up to a point close to the top, but then required excessive force to lock it in the open position so I could extract the fired cartridge. I fired a total of 15 cartridges. All required extra effort to lock the bolt open, so it could extract the round. Some required more force than others.

I measured fired and unfired cartridges, and dimensionally, they were almost identical. The only measurement that was different was the diameter of the neck. An unfired case measured 0.338" while the fired case neck diameter measured 0.345". I don't know if that is normal since I don't reload.

Any thoughts?
Over pressure?

Got a pic of the rear of the cases? Primer area
 
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TY!!

These rounds are factory, though. What would cause the overpressure?
Factory rounds can have over pressure. Try a lighter grain. I’ve seen 6.5 CM have issues in some guns with factory ammo as well

After trying 6.5 CM and 300 PRC I seen pressure issues and went back to my 260 and would go back to 300 WM throated longer if I went back to a long action mag again
 
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Factory rounds can have over pressure. Try a lighter grain. I’ve seen 6.5 CM have issues in some guns with factory ammo as well

After trying 6.5 CM and 300 PRC I seen pressure issues and went back to my 260 and would go back to 300 WM throated longer if I went back to a long action mag again
I will try a lighter grain round
 
Nothing on the heads, but I don't know about the crimp.

I will try some Berger 215s
But then again.. other things to consider. Hornady brass is not the greatest either. I don’t use Hornady brass but I’ve heard they are soft an thin. So the pressure could be expanding out to the base of the case as well. Causing such over pressure signs. I wouldn’t worry about it imo. I say you should be fine shooting them. I mean you don’t reload so your just gonna toss those factory brass anyways. But if you ever do reload, buy Lapua and don’t reload range picked brass.