Tom, Identical; I can tell no difference at all. My load is either the Speer 400 or the Remington 405, 50.0 grains of IMR-3031, Remington 9-1/2 LR primers loaded in R-P, W-W, or *-* cases. OAL is 2.540", velocity is 1645 fps avg (taken at 83 humid degrees). I did try the CCI-200 as a substitute primer once and the groups opened up (the above load will consistently shoot 1-1/2 MOA), I went back to the REM 9-1/2 and it performs best with either bullet in my Marlin M1895.
