Sharps Nitro, like wise to above, I also use sub-sonic .22LR ammo in my .22 LR rifles and load up sub sonic ammo for the 7.62x39 and .308 (rifles) and .40 S&W (pistol), in particular. I cant remember the reloading data off the top of my head but I use it in developing and assessing the sound suppressors that manufacture.
It's a whole lot of FUN and Trail Boss (apart from being expensive), is just perfect for this job in the rifles!
Hope that helps
Doh! Homer
-------------------- "Beware the Lolly Pop of Mediocrity,
Lick it Once and You Will Suck Forever"