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243AI or 6mmAI m

 
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  #1  
Old 06-12-2011, 06:45 PM
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243AI or 6mmAI m

I am place Ming a new build and I'm leaning toward a 6mm of some sort. I am thinking 243 AI or 6mm AI. I like the added velocity of the 6mm AI. But the brass offerings of the 243. so I'm asking for opinions on the 2 or even other good short action long range calibers. Its going in a single shot small shank savage action. Its going to be used for deer and antelope. Rocks. Steel p dogs that sort of thing.
So please all input wanted.
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Old 06-12-2011, 08:43 PM
B23 B23 is offline
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Re: 243AI or 6mmAI m

IMO, a 6-284 would be better than both. Lapua brass. More case capacity which really shines with the heavier long range bullets and best part of all, no fireforming.
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Old 06-12-2011, 08:53 PM
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Re: 243AI or 6mmAI m

Very nice idea! Donyou think I would Have issues ejecting a loaded round with a 6-284 on a short action?
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Old 06-12-2011, 09:28 PM
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Re: 243AI or 6mmAI m

A 6-284 is way better suited for a long action, but building them on a short action can be done. Trevor with CPG build me one and it shot fantastic. I would lean towards a 243AI as they are much better suited for a SA. Trevor has a great reamer for one, every one I have been around that he has build has shot in the high 2's to low 3's if the shooter can do his part. I am shooting the 105 right at 3270 out of a 26.75" tube and most of the 6-284's he builds only shoot 3280-3350. You are giving up quite a bit of barrel life with the 284.
As far as fireforming goes, Trevor can build you a hydro form die out of your resize die to where you never have to fireform at all. When you form the cases they come out about .005" over a fired case, so then you just run them through your resize die and bump them back to .001ish" smaller than a fired case and you are good to go!!. Here is how my last Trevor 243 AI shoots. Would be worth a trip down the street I would guess.
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Old 06-13-2011, 01:56 PM
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Re: 243AI or 6mmAI m

Quote:
Originally Posted by Tikkamike View Post
I am place Ming a new build and I'm leaning toward a 6mm of some sort. I am thinking 243 AI or 6mm AI. I like the added velocity of the 6mm AI. But the brass offerings of the 243. so I'm asking for opinions on the 2 or even other good short action long range calibers. Its going in a single shot small shank savage action. Its going to be used for deer and antelope. Rocks. Steel p dogs that sort of thing.
So please all input wanted.
the Savage action is a little longer than a Remington, and this makes things easier. I'd go with the 6mmAI without a secound thought. But you might also consider using a 6mmAI reamer, and set the headspace with a .243AI gauge. This gives you the .243 case length but with the better 6mm neck design (you'll still have to use 6mm brass). The 6mmAI barrel will last longer than a .243AI barrel, but most of all the longer neck will help you keep the base of the bullet out of the shoulder area of the case. As it should be. I'd also be thinking about a 1:8 twist barrel for really long range bullets.

The 6AI barrel will have a much longer barrel life than the 6/.284 if that matters. Both rounds are overbore, but the 6/284 is getting excessive. Precision Shooting ran a test a few years back, and found the 6AI was almost a 100FPS faster, and handled the long VLD's better than the .243/.284 case did. Might also want to think about a 6Vias
gary

Last edited by Trickymissfit; 06-13-2011 at 02:07 PM.
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  #6  
Old 06-13-2011, 02:16 PM
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Re: 243AI or 6mmAI m

Tricky, how in the world is the 6mmAI barrel going to last longer than the 243ai?
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  #7  
Old 06-13-2011, 02:35 PM
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Re: 243AI or 6mmAI m

Quote:
Originally Posted by 300saum View Post
Tricky, how in the world is the 6mmAI barrel going to last longer than the 243ai?
I was just going to ask the same thing.
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