I just found out that TJ’s has a 9″ twist barrel available…. I think that might be OK for this bullet…. I plan to assemble a gun around that barrel, so if we can get some interest in this bullet we may have a good combination for a long range PCP without having to resort to extreme pressures…. 3000 psi should be enough with a 28″ barrel to reach into the mid 900s….
Based on the results of the .308 cal 154 gr. BBT, which has identical proportions, there is a good chance that this bullet would be usable in a 10″ twist….