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What To Expect From 6mmAI

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Unread 03-13-2007, 06:19 AM
Silver Member
Join Date: Nov 2004
Location: Shiro, TX
Posts: 102
Re: What To Expect From 6mmAI

I'll second the 243AI. The brass is better and easier to find. Many people say that it is a barrel burner but if thats the case then the 6mm and 284 are burners for sure. You can eject a loaded round which happens often when you chamber on the stand or preparing for a shot that doesn't happen or the range offer calls cease fire. The 243 AI will come within spitting distance of the 6mm AI and 284 so whats the point. If you plan to shoot the VLD's they will most likely shoot tighter groups at around 3200fps so the extra capacity of the bigger cases is not really needed.
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Unread 03-13-2007, 07:06 AM
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Join Date: Aug 2005
Posts: 558
Re: What To Expect From 6mmAI

I have both 6mmAI and 6mm-284, the 6mmAI has about 5-6 grains less powder capacity so you give up around 50-100 fps depending on bullet weight . but slightly less powder capacity along with the much longer neck translate into much improved barrel life, the 6mm-284 is really a barrel burner(I have burned up 2). the Remington 6mm brass is not on par with Lapua brass that you can get for 6mm-284 or 243AI but the lot I have is surprising good.
LWolken's point that the 243AI "will most likely shoot tighter groups" is absolutely ridiculous, if you were talking about a 6BR shooting tighter groups it might have some merit.
It takes 43 muscle's to frown and 17 to smile, but only 3 for proper trigger pull.
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Unread 03-13-2007, 08:04 AM
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Join Date: Feb 2007
Location: Northern CO
Posts: 142
Re: What To Expect From 6mmAI

I don't know why you wouldn't just leave it as a .243? You're plenty good out to 250 on the biggest Buck on the planet... hell, I'd shoot one at 400 with the .243 and any well constructed bullet. Load up some 95 grain Nosler BTs at about 3100 and it'll be lights-out on just about any critter you've got running around there in TX... with the exception of some of the bigger exotics like Nilgai or Oryx.

A couple of other things too:
1. The 6mm AI doesn't "require a short action" it's not any longer than the regular 6mm. It may make it easier to seat the bullets into the lands... but it is not a "requirement". If one had to pull the bolt to extract a loaded round then it obviously didn't fit in the magazine. Load them so they fit in the mag and you'll never have any extraction problems. If you have the chamber cut with minimal throat then you'll be able to get bullets close to the lands and fit them in the magazine.
2. I had a 6-284 with a 24" pipe and it wasn't any quicker than my current 6mm Rem. with a 24" pipe. I don't doubt that the 6-284 should be faster, but I believe it takes at least a 26" pipe to make a difference.
3. If you're worried about having enough thump to shoot deer at 250 with a .243 then you should become a gun writter... it seems they're the only guys around who can't hammer anything bigger than a coyote with 6mm caliber guns.

I think the Remington 700 CDL in .243 is one of the greatest "truck guns" a guy could have. It's a little on the pretty side for beating around on the floor board, but that has never mattered to me. Buy it and shoot it for a while before you do anything drastic to it... I bet you'll be a believer in the .243 in no time at all.
Dirty Dogs... Down Dirt Cheap!!!
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Unread 03-13-2007, 09:06 AM
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Join Date: Aug 2005
Location: White City, Saskatchewan
Posts: 218
Re: What To Expect From 6mmAI

I'm with .25AOD, shoot the 243. I have a 243 savage that I shoot 95gr bergers out of and I am actually embarrased to say how much I like the rifle and the round. I have shot 3 whitetail deer with it and a few coyotes. The furthest deer was 423 yards and the furthest coyote was 546. I have never not had the bullet exit with atleast an 1.5" exit. This gun never leaves the truck. I have just over 20 rifles in the safe, including a 6mmAI, and this 243 is the only one that seems to get used.
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Unread 03-13-2007, 09:38 AM
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Join Date: Dec 2005
Posts: 181
Re: What To Expect From 6mmAI

25AOD, good point outs. I have no experience with the 6mm caliber as all my attention over the years has been on the 264mag, 270win and the 220swift. That's why I ask you fellers about the 6mmAI and what it has to offer. You read all kindof stuff where this guy says it's the best thing since sliced bread and another says it ain't big enough for whitetail with bullets under 100grs which I know is a bunch of hog wash. Hell I read somewhere where there has been a few African elephant taken with a 243.

My reasoning for thinking of going the 6mm Ackley way was to get a little more gettyup over the 243 and have about the same performance as a 6mm with a 26" pipe using the factory 24". Shooting the swift over the years spoiled me to how flat they shoot and I want something compatable to it in the 6mm, plus be able to get the bigger pills up to a decent velocity.

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Unread 03-13-2007, 10:24 AM
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Join Date: Jan 2007
Location: Great Falls, MT
Posts: 205
Re: What To Expect From 6mmAI

On the topic of 6mm/243s I fall into the catagory of "it's the best thing since sliced bread with butter and jelly!!!" I think they're the hammer of Thor on anything up to deer sized game (and a few caribou).

Back to your initial question; I have heard GREAT things about the Barnes tsx bullets and I am going to try them this year. I accidently found a load for my 6mms, I was looking for a plinking load for the kids, cheap bullets and powder I had left over. It is a stout load of R-19 behind a 80gr Rem cor-lock bullet (the cheap ones sold in bulk) that is an absolute lazer for me. 3/4" all day long.
Genises 27-3: Now therefore take, I pray thee, thy weapons, thy quiver and thy bow, and go out to the field, and take me some venison...
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Unread 03-15-2007, 04:38 AM
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Join Date: Dec 2006
Location: Dogpatch, NY
Posts: 698
Re: What To Expect From 6mmAI

Have an older M700 BDL,6mm Rem.
85-90 gr Barnes gets the job done.
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