it's been awhile since i reloaded for my .300 savage ( based on the modle 99 savage lever action ) .
for powders , my rifle really liked imr 4064 and nosler balistic tips in 150 and 165 grain seated just off the lands of the rifling ( basicly as far out as the magazine would let me )
hornady 165 boattails worked very well too .
i normally use mag primers
after the cases had been fired at least once in the rifle , i would only neck size the neck around 75- 80% , leaving a small portion of the neck not touched by the dies .
if you do this make sure the ammo you reload still functions through your rifle .
if it's is too tight , have the case move father into the die till it chambers properly .
avoid resizing the shoulder .
my first moose was shot with this rifle .
bullets for moose , i'd go with 165 grain partions , or barnes x bullet .
if you use the barnes bullet make sure your barrel is dead smooth and clean , or the barel will foul with copper very easily causing very large groupings