The 375 Raptor sure sounds interesting. A 270gr Speer at 2350fps is impressive from the 308 case. That would give a 9.3x57mm mauser pause for concern. A 9.3x51 should be equally impressive if the case has minimal taper and pressures are up there. Also enjoyed the video of the 300gr Sierra Gamekings at 2250fps.
Having played with a few... I know this to be accurate...
.375 SOCOM is identical to .358 Winchester (so identical... same powder, same powder charge, same bullet weight and only 10 FPS different.
.375 Raptor is in the same kinda way equal to 35 Whelen (Speed and energy wise). Google for better details.
