My Hi-Points have a large bore. I can't put a big enough cast bullet into a case and have it chamber in the gun. So I cast the bullets on the softer side and use a quick powder to bump up the soft bullet into the grooves quicker to seal it off. When I powder coat for the 40 and 45 I use soft lead same as I use for the mouse fart loads in 30 cal. Some may think harder is the way to go .. and it may be for really fast cast loads with much more pressure.