• 1 WEEK LEFT: This Target Haunts Me Contest

    Tell us about the one that got away, the flier that ruined your group, the zero that drifted, the shot you still see when you close your eyes. Winner will receive a free scope!

    Join contest

155gr. or 175gr.?

Dusty

Sergeant
Full Member
Minuteman
Apr 21, 2003
173
3
Louisiana
I have been shooting 175gr. SMK in my .308, but was thinking about trying some 155's. I remember a post a while back, where somebody said that they where shooting a 155 load that would come close to the ballistics as a .300 WM as far as wind and drop. I couldn't find it with the search engine. anybody remember this? BTW what is the Ballistic coefficent of the Lapua 155's?
 
Re: 155gr. or 175gr.?

155's buck the wind better, have more retained energy @ 1k, and recoil less, what not to like about them, downside are Scenars are mail order only, and pumping them out at 3000fps will ruin your barrel faster.
 
Re: 155gr. or 175gr.?

That .508 is almost falsely optimistic, and applies ONLY to velocities that are way up there.

200 yards downrange and a Scenar's BC on a G1 model is closer to .45 or so.