RE: how much powder do i use??
don't know about the NEF but in my 45cal Encore I shoot 2-50 grain pellets, 100 grains and it does well... if I want a little more thump I drop in another 30 grain pellet... never could get any good accuracy with the 150 grain loadings though... try 2/3rds of the max recommended and see how it shoots... go from there...