Geezer:
Mine are pre-war and post-war Winchesters. The heavier bullets like the 270 gr Hawk, are best used in the 348 Ack Improved. It worked
for me in an Alaskan moose north of homestead land in 2007. One shot.
With bullet construction improvements available now, the 348 WCF needs nothing really heavier than the 250 gr. bullet, IMHO.
Some of the better bullets in order of toughness or bonded cores: Woodleigh, Alaska Bullet Works (both bonded core in 250 gr). And Hawk Bullets-which use a similar process of jacket.
These are hunting bullets. Others like silvertips, Hornadys, Barnes - Remingtons 200 grs are best left to deer or antelope -or ....sighting in or practice.
The advantage of Hawk bullets is various bullet weights from 180 through 270 grain. Andy at Hawk Bullets made up some spire pt 190 grs for me as well as a few 300 gr
for the 348 Ackley Imp. Really too heavy but they worked.
