Thread: 308 Subsonic

http://www.bergerbullets.com/twist-rate-calculator/

Doesn't look very stable even from 1:10 twist.

Bullet Parameters
BC0.648 G1
Caliber 0.308
Weight 208 grains
Length 1.533
Gun and Atmospheric Parameters
Muzzle Vel 900
Barrel Twist10 inches
Temperature 20
Your bullet is MARGINALLY STABLE.
Your bullet stability is marginal. You may shoot good groups under these conditions, but the BC of the bullet will not be optimized.

SG = 1.10
Bullet BC (G1):0.648
Adjusted BC for 1 in 10" Twist:0.570
Your BC is being compromised by:12%
Minimum Twist Recommended:1 in 8.50"