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243 for long range hunting

 
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  #1  
Old 02-19-2011, 08:36 AM
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243 for long range hunting

Looking for info on a 243 270 Win. imp for long range hunting for deer and antelope with the 115 Berger and 117 Matrix bullet. Also the best rifling twist and optic and rect. for same.
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  #2  
Old 02-19-2011, 01:35 PM
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Re: 243 for long range hunting

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Originally Posted by 03Rick View Post
Looking for info on a 243 270 Win. imp for long range hunting for deer and antelope with the 115 Berger and 117 Matrix bullet. Also the best rifling twist and optic and rect. for same.
I think you mean a 6mm-06AI. I dont have any info on it but maybe if you try a search with 6mm-06 you will turn up some results. The BC on thouse Bergers is over 500 very nice.
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  #3  
Old 02-19-2011, 03:05 PM
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Re: 243 for long range hunting

There is also a 115 DTAC bullet, available from David Tubb.

Still some argument on what twist is needed for these heavy 6mm bullets, because they are relatively new. Tubb was using 7.5 twist last I heard. Some guys are using 8 twist rates.

You'll find many opinions on optics and reticles. Personal preference really. I use NightForce or Leupold optics. I like the NF NP-R1, NP-R2 and Leupold TMR (on the 8-25X Mark4)
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Old 02-19-2011, 04:23 PM
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Re: 243 for long range hunting

Thanks for the optic info. Being an more mature person now my eyes aren't what they used to be and I agree with the extra mag. on the top end. Do you use a 20 MOA for long range on your scopes?

About the twist, it is a fairly big investment for a barrel and I would like to hit it on the head the first time if possible. The loading programs I have list a twist of 7.5" and 8.3" for 115 grain bullets.

Does anyone know how critical twist is for accuracy if it is only .5" diff.?
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Old 02-19-2011, 08:14 PM
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Re: 243 for long range hunting

Quote:
Do you use a 20 MOA for long range on your scopes?
A few of my rifles have 20min bases, a few do not. Most have a scope with some sort of holdover/windage reference on the reticle (Leupold's TMR for example).

Quote:
About the twist, it is a fairly big investment for a barrel and I would like to hit it on the head the first time if possible. The loading programs I have list a twist of 7.5" and 8.3" for 115 grain bullets.
That's where the argument comes in. I believe those bullets are right on the fence between those two twist rates. David said that he discovered 8 wasn't quite enough for his 115 DTAC. Alot of people are using 8 though. Fact is, David was using 8 until some particular match.??

Guess it depends on your possibilities, if you know for fact that you really want to shoot 115's/117's and will try all of them before dropping bullet weight, I'd go 7.5, If you're willing to also shoot 95's and 105/107's........8 is plenty fast. If I were a betting man, I'd bet 8 twist will do it from the 6-06 Improved, just because it's faster than David Tubb's 6XC.

Maybe some others will chime in on this. If not, you could try another thread labeled something like "what twist rate do I need for 6mm 115 grn bullets" I bet you'd get lots of opinions.

Good Luck
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  #6  
Old 02-19-2011, 09:12 PM
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Re: 243 for long range hunting

Quote:
Originally Posted by 03Rick View Post
Thanks for the optic info. Being an more mature person now my eyes aren't what they used to be and I agree with the extra mag. on the top end. Do you use a 20 MOA for long range on your scopes?

About the twist, it is a fairly big investment for a barrel and I would like to hit it on the head the first time if possible. The loading programs I have list a twist of 7.5" and 8.3" for 115 grain bullets.

Does anyone know how critical twist is for accuracy if it is only .5" diff.?
Given that the jury is still out on the appropriate twist for a 6-06AI shooting 115grain bullets, let me suggest the 6.5mm-06 or 6.5x284 or 260Rem. The 6.5mm bullets have an awesome BC (140grain VLD = .612) and it's well known that the heavy 6.5mm bullets shoot well with a 1:8 twist.
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  #7  
Old 02-19-2011, 09:43 PM
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Join Date: Feb 2011
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Re: 243 for long range hunting

Thanks for all your advise. It is snowing here tonight and will give me time to ponder the 243-264s' ideas again. I might be back at the drawing board again. I am narrowing in on the optics thou.

When I do zero in on a cartridge does anyone have any leads for a gunsmith near my north AZ location that can do the barreling and drill and tap the scope mount holes in the receiver?

R
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