Projectile length

[Dolomite_Supafly]

I am working on some subsonic loads and was needing some measurements or a link where I can find the length of 308 SMK's.

I am needing lengths for these weights:
175
180
190
200
210
220
240

I am needing the lengths so I can determine which would be best for a 11 twist barrel with a velocity of 1050. I am going to be loading to a point where the bullet is hopefully just barely stabilized. A friend and I were talking about performance of HP's and figured a bullet that was barely stabile would tumble. Our thoughts are that HP performance is mediocre at best with a subsonic 308 and that a bullet that tumbles on impact would be more a more reliable performer.

The heaviest bullet that will be stabile to 100 yards is what I am looking for. After that I will be test the load to see if it tumbles as is passes through water.

I am not using a full size rifle cartridge case. It is a small case to optimize the case capacity.

Thanks
Dolomite

 

[treebasher]

Re: Projectile length

JBM Ballistics:

http://www.jbmballistics.com/ballistics/lengths/lengths.shtml

0.308 168.0 MatchKing™ (Litz) 1.215
0.308 175.0 MatchKing™ (Litz) 1.240
0.308 180.0 MatchKing™ (Litz) 1.277
0.308 190.0 MatchKing™ (Litz) 1.353
0.308 200.0 MatchKing™ (Litz) 1.393
0.308 210.0 MatchKing™ (Litz) 1.478
0.308 220.0 MatchKing™ (Litz) 1.489
0.308 240.0 MatchKing™ (Litz) 1.591

 

[Dolomite_Supafly]

Re: Projectile length

Thanks a lot, I knew someone could help me out.

Dolomite