I get consistent 1600 fps with the 270 GDSP in my Marlin 1894. It has been a reliable killer on whitetails and hogs. The degree of expansion seems to depend on what/where you hit, but with hogs I get more expansion than I do with deer. I don't shoot the 270 grain load in handguns.
I did start out with 21.5 grains H110, but found I got better accuracy with 21 grains.
