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.308Win vs. .308 Win Imp.

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Old 11-04-2003, 05:15 PM
Junior Member
Join Date: Nov 2003
Location: NZ
Posts: 9
.308Win vs. .308 Win Imp.

Has anyone had experience rechambering a .308 to improved?? I am considering this for my Omark 44D to launch 55gr projectiles, but am unsure if there will be much performance gain. Quickload is suggesting i might get 4200fps with a N110 or slightly slower with N120.
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Old 11-05-2003, 10:28 AM
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Join Date: Jul 2001
Posts: 1,459
Re: .308Win vs. .308 Win Imp.

Performance will improve max 5% over orig case. Alot depends on the barrel and projectile. sometimes the increased vel doesn't help because the barrel tuning likes it slower.

Only one way to find out.

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Old 11-08-2003, 02:12 PM
Junior Member
Join Date: Nov 2003
Location: NZ
Posts: 9
Re: .308Win vs. .308 Win Imp.


thanks for the info. based on quickloads calculations i might get another 200fps. Barrel twist is 1 in 12.

Need to get it onto the range and work up some loads , really looking forward to seeing what these custom 55gr .30cal projectiles will get up to.
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