.308Win vs. .308 Win Imp.

sub 10/22

Member
Joined
Nov 4, 2003
Messages
9
Location
NZ
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.
Cheers
 

Mysticplayer

Well-Known Member
Joined
Jul 27, 2001
Messages
1,459
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.

Jerry
 

sub 10/22

Member
Joined
Nov 4, 2003
Messages
9
Location
NZ
Jerry

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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