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Chosing the right .243/6mm

 
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  #1  
Old 12-02-2010, 10:59 AM
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Location: Elizabeth, WV
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Chosing the right .243/6mm

I am sure this question has been asked a lot, which 243/6mm do you guys prefer. I plan on shooting 55 70 and 80 grain bullets so i will get a short throated reamer. Never intend on shooting 100s but maybe i would in the future. I want to build this gun for coyotes and deer in the 8lb range. I plan to have my wife shoot it (make her think its for her) so it cant recoil a whole lot.

I have been looking at, tell me if i missed a good one, 6 ppc 6br 243 win 243 improved 6mm rem, 6mm improved 6-284 243wssm and 240 weatherby. The ppc and br are the most accurate i know, but i'd like bigger. I want something cheap to shoot that brass is easy to come by so that kills the weatherby. I read some really bad reviews on the wssm. I dont want to lose an inch of barrel to a rechamber every 500 rounds.

That leaves the 243 win, 243 improved, 6mm, 6 mm improved and 6-284. They say the 6-284 doesnt shine until you get big bullets, i dont plan to shoot big bullets so how would it do with small bullets? I am wanting to shoot the 55 at 4-4200 if i can. I dont mind sizing the 284 brass but i'd PREFER to not have to fire form unless there is a big gain. What do you guys think? Also what twist would you go with? Would a 12 stabilize the 80s or should i go 10?
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  #2  
Old 12-02-2010, 11:08 AM
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Re: Chosing the right .243/6mm

I use a .243 AI in a 1-10 twist varmint contour bbl. for 75 gr. bullets. When I build another, I will use the 6mm as the parent case, just for the slightly onger neck, altho the .243 has worked well for me.
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Old 12-02-2010, 11:10 AM
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Re: Chosing the right .243/6mm

I use the .243 AI in a 1-10 twist varmint contour bbl. with 75 gr. bullets, when I build the next one I will use the 6mm as the parent case jsut because of the slightly longer case neck, altho the .243 has worked well for me.
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Old 12-02-2010, 11:57 AM
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Join Date: Jun 2010
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Re: Chosing the right .243/6mm

Quote:
Originally Posted by wvcountryboy View Post
I am sure this question has been asked a lot, which 243/6mm do you guys prefer. I plan on shooting 55 70 and 80 grain bullets so i will get a short throated reamer. Never intend on shooting 100s but maybe i would in the future. I want to build this gun for coyotes and deer in the 8lb range. I plan to have my wife shoot it (make her think its for her) so it cant recoil a whole lot.

I have been looking at, tell me if i missed a good one, 6 ppc 6br 243 win 243 improved 6mm rem, 6mm improved 6-284 243wssm and 240 weatherby. The ppc and br are the most accurate i know, but i'd like bigger. I want something cheap to shoot that brass is easy to come by so that kills the weatherby. I read some really bad reviews on the wssm. I dont want to lose an inch of barrel to a rechamber every 500 rounds.

That leaves the 243 win, 243 improved, 6mm, 6 mm improved and 6-284. They say the 6-284 doesnt shine until you get big bullets, i dont plan to shoot big bullets so how would it do with small bullets? I am wanting to shoot the 55 at 4-4200 if i can. I dont mind sizing the 284 brass but i'd PREFER to not have to fire form unless there is a big gain. What do you guys think? Also what twist would you go with? Would a 12 stabilize the 80s or should i go 10?
been thru a few 6mm's in one form or another over the years, and have made a few opinions as well.
* if all you shooting is under 400 yards for coyotes and things like that; then a 6BR is the perfect round for you. An extremely accurate design that just seems to shoot everything well. The 6BRX is it's big brother, and does things a tad better

* might want to give some thought to the 6XC. Pretty much nothing but a 22-250 necked up to 6mm. Very accurate, and has some more range than the 6BR. I shoot the 6/250AI, which is nothing but a 22-250AI necked up to 6mm. In a fast twist barrel it's good for an honest 650 yards on coyotes, and will punch paper out to 1000 yards on a good day. Neck is a little short, and my next barrel will use a 2" overall length (made out of .243 cases). The nice thing about these rounds as well as the 6BR is that they shoot very well in heavy short barrels (23")

* 243 Winchester has been playing catch up with the 6mm Remington for 50 years now. Barrel life is about 2/3rds as long as the 6mm at best. Does not handle short bullets all that well due to it's too short of a neck length. Also dosn't do long VLD's and such all that well because you have to sing the bullet into the shoulder area with a standard length chamber. The 6mm handles the full range of bullets well if it has the correct twist rate (the same would apply to the .243 as well)

* the 6mm HLS maybe the perfect 6mm round! It's pretty much a .243 with a 6mm neck and shoulder. Chambers can be reamed with a standard 6mm remington reamer, or better yet a 6mm Ackley reamer. Very accurate with a good barrel life. Best version yet is the one reamed to the same shoulder length as the 250 Ackley. This round does everything right

* 6/.284 shoots fast, and eats barrels fast. Is no better than a 6mm Ackley, and has about half the barrel life (way overbore). But there are a couple 6/.284 versions out ther that seem to work much better. One is a 6/284-.100" short (at the shoulders), and the other is .150" short. The latter seems to be about 150 fps slower than the full bore .284 case, but the barrels seem to last over twice as long (if not longer yet)

* 6 Vias is just one bad Jose! It shoots 70 grain bullets faster than a max loaded 220 Swift shooting 50 grain bullets! Pretty much nothing but a 6.5x55 Ackley necked down to 6mm. It's a better round than the 6mm-06 and the .240 Weatherby. There's also the 6x47 and 6x44, but have not been around them much if any. Cases can be hard to come by and somewhat expensive.

So it's kinda pick your poison! I like the HLS reamed off an Ackley case with the 250AI shoulder length. Yet if you just gotta go realy fast the 6mmAckley is probably the best of everything
gary
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Old 12-02-2010, 12:03 PM
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Re: Chosing the right .243/6mm

Quote:
Originally Posted by MTBULLET View Post
I use the .243 AI in a 1-10 twist varmint contour bbl. with 75 gr. bullets, when I build the next one I will use the 6mm as the parent case jsut because of the slightly longer case neck, altho the .243 has worked well for me.
that would be known as a 6mm HLS.
gary
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  #6  
Old 12-02-2010, 12:57 PM
B23 B23 is offline
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Re: Chosing the right .243/6mm

Will you be using a short or long action?
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  #7  
Old 12-02-2010, 12:58 PM
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Location: Wyoming
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Re: Chosing the right .243/6mm

I have several of the big 6mm's that push 55 grain bullets in that 4000-4300 fps range you want. I like the 243 AI best of the ones I have shot. It is slower by just a bit than my 240 wby, 6mm-06 imp, 240 gibbs, etc but it seems to be a bit easier on barrels. Accuracy is amazing with the 243 AI. Mine consistently shoots under 3/4" groups at 300 yards.
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