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Old March 20, 2013, 07:35 PM   #20
Bart B.
Senior Member
 
Join Date: February 15, 2009
Posts: 5,180
To get 155's out the barrel fast enough to remain supersonic through 1000 yards, you'll need a 30" one to shoot 'em at least 2950 fps. 175's will be just fine leaving at 2600 fps.

If your barrel's groove diameter's a few ten thousandths smaller than bullet diameter, your chances are excellent the 175's will shoot very accurate.

1) You will be able to get my 24 " barreled 308 to shoot 1k accurately and consistently. Try 43 to 44 grains of IMR4064.

2) That load will likely work for all ranges from 100 to 1000 yards.
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