Re: Reloading for the AR10
I would always start at the recommended lowest load and work my way up just like any other load. I've heard, but have no scientific data to back it up, that loading between autoloaders and bolts is no different. I have an adjustable block on mine and tune it to just-cycling and no more. On my loads lately on a DPMS LR-308, I'm using IMR-4064 below Hodgdon's maximum, but above most others' maximum for that powder and that bullet (175 gr Sierra MK HPBT). Seems like IMR-4064 gives the best MV's at acceptable pressures and I like it. I full-length resize every round because it is an autoloader and I use CCI-34 primers because they are designed for free-floating firing pins. I guess the bottom line is, that no, I wouldn't back off on anything so long as you use the standard procedure of starting at minimum recommended load and working your way up, constantly looking for pressure signs. Then again, that's just academic and you know it already.