Originally Posted by
Lloyd Smale
problem is that if a guy uses a lighter spring or buffer you are going to end up have problems with having enough power to reliably chamber a new round. The 300 blackout develops more pressure at subsonic levels due to its heavier bullet. I thought of your cure myself but guys that have tried it tell me its not the answer. Not that it isn't worth a try though. I don't know what the problem is. Maybe its something Elbert Einstein might have a better answer to then one of us handloaders but I tried re17 and re19 today with the same results. I get within a grain of powder of the gun running but that grain gets me supersonic speed. Re17 was subsonic eject the old brass but wouldn't pick up a new one at 12.9 grains. at 13 it ran but was supersonic. Same thing with 19 at 13.9 and 14. One other major stumbling block here is crud. After 10 or 15 rounds you have unburned powder all through the action that gums up the trigger mechanism and gets in the chamber and makes chambering harder. When and if I find a load that runs its going to be right on the ragged edge of working and not working and if it doesn't run a 30 round mag without a hiccup do to fouling what good is it.