Here is a coupe of 44's I have been playing around with.

I shot half a dozen bullets into a big old wet honey locus log, that is deteriorated, at two different sections. With the data have, it should be well over 200 yards before that bullet hits the 900fps mark. In fact, It should still be moving around 1075fps at 100 yads. Not to shabby IMHO...


Left-air cooled WW at 900 fps


Right-air cooled WW at 1200fps