Re: \"Super-sonic\" question...
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Yes, I have a few loads for 308 Win but they are not for general use. They're position sensitive as I don't/didn't use a filler in the case and couldn't use a giant long projectile (I use a Speer 125 TNT vice a 240 Sierra MK). Using a filler can be a problem as it'll eventually get caught up in the baffles of the suppressor and you'll end up with a baffle strike by a projectile (not a good thing). I used a very small amount of power and carried the rifle upright to keep the powder seated next to the primer until a shot was required...change the position a bit and the powder burn/ingition rate changed a bit and the rounds were supersonic (not what I desired).
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Dave, my load with n320 and LP primers and 150gn lead bullets didnt seem too position sensitive, even though i tested it fore and aft--seemed about 80fps spread IIRC. Gotta watch how close you play to the sound barrier [img]/ubbthreads/images/graemlins/smile.gif[/img]
I gave up squib loads in my 223 and just shoot normal ammo thru it [img]/ubbthreads/images/graemlins/wink.gif[/img]