Thanks Brian, I'm not sure how to determine that chart? I subtracted a cartridge length since I was measureing the distance only the bullet has to travel. I would think an odd number of passes would put the shockwave at the muzzle and an even number near the breech.
And I realize that the bullet to the muzzle time would actually be less than the overall exit velocity but I was just trying to use some known basic data and see how much I had to tweak the bullet speed to alter the number of shockwave passes.
After some testing all year, I've found some good loads for my .204 and .223. Now I might play with the OAL to see if I can improve those even more. Thanks.
What direction did that last shot at Kennedy come from?
Last edited by tpcollins; August 7, 2012 at 06:28 PM.