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How heavy can we go in the .308 Win?

 
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  #1  
Old 11-23-2002, 12:40 AM
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How heavy can we go in the .308 Win?

What is the heaviest bullet weight that one can "accurately" fire in a .308 Win. with a 1/12 twist, 26 inch barrel, and the projectile still remain stable at the magical 1000 yard range?

The reason I'm asking is that I have 450, 210gr. Bergers left sitting on my shelf after I sold my .300 Win Mag Sendero, and wondered how well they'd do in a Rem 700VS. I am assuming a muzzle velocity of 2400 fps. Thanks for any comments! [img]images/icons/cool.gif[/img]
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Old 11-23-2002, 12:57 AM
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Re: How heavy can we go in the .308 Win?

I'm pretty sure they won't work with out a 10 maybe an 11 twist. The 12 twist will work up to 168, maybe 178 or 180 maybe, beyond that you will be lucky. My 308 won't even stabilize a 180 with the 12.
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Old 11-23-2002, 02:12 AM
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Re: How heavy can we go in the .308 Win?

Brent, I have noticed that Hornady listed loads for their 190 gr. BTHP Match bullet in the Fourth Edition of their manual for the .308. The loads here chronographed at 2400-2500fps max. from a 1/12 twist, 22 inch tube. Unfortunately, they don't give any indication to what the average 100 yard group size was! [img]images/icons/rolleyes.gif[/img]

Just as a curiousity, there is a member of the Varmint Hunters Association(of which I am a member too) by the name of Bruce Artus who has been launching 220gr. Matchkings and making repeatable confirmed hits out to around 3100 yards......with a .308 Ackley Improved and a 1/8 twist Obermeyer barrel. Who really needs laser trajectory and barrel burning? [img]images/icons/wink.gif[/img]
__________________
**************************************************
My 5 Favorite Calibers in my collection, in order:
.416 Rigby
.35 Whelen
6mm Ackley
7mm BR
6mm PPC

**************************************************

"Sic Semper Tyrannus"
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  #4  
Old 11-23-2002, 04:02 AM
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Re: How heavy can we go in the .308 Win?

MC,
my Load From a Disk program says that a 190gr SMK still needs a 10 twist up to 2790 fps then a 11 twist will work beyond this up to 3190 and then a 12 twist will work.

I'll bet that's one hell of a tapored base on that 308 he's got there. [img]images/icons/grin.gif[/img]

I can just picture the bullet path now, they probably have to tip the target stand backwards so it doesn't tear the target vertically on impact. [img]images/icons/grin.gif[/img] [img]images/icons/grin.gif[/img] [img]images/icons/grin.gif[/img]
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  #5  
Old 11-23-2002, 08:51 AM
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Re: How heavy can we go in the .308 Win?

I shoot the 190SMK moly coated, in my Remm700VS, 26" 1-12. I'm using 43gr RL-15, and getting repeatable .5moa accuracy out to 200 yards. That's as far as I've shot them.

Before starting, I spoke with one of the guys at Sierra. After my inquiry, he put together a load at a relatively slow 2200fps, and it printed 3/8" groups at 200 yards, in .308 case, 1-12 twist, in their testing facility.

MM

[ 11-23-2002: Message edited by: MontanaMarine ]
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  #6  
Old 11-23-2002, 11:12 AM
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Re: How heavy can we go in the .308 Win?

I have two 308's with 1 in 12 twist barrels and they will both stabalize the 190 MK. to 600 yards at least. I just prefer a 155 MK at 2900, or a 175 MK at 2700 fps for 1000 yard work. While I am not recoil sensitive shooting 50 of the 190's from the prone position will work on me by time I am done.

Shoot Safe Shoot Straight.....RiverRat
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  #7  
Old 11-23-2002, 01:56 PM
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Re: How heavy can we go in the .308 Win?

5 Degrees!! Wow....thats 300 moa...thats more than a sight base, during the off season, it can be gainfully employed as a splitting wedge!! [img]images/icons/grin.gif[/img] [img]images/icons/wink.gif[/img] [img]images/icons/grin.gif[/img]

MM
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