by Waynzee » Sat Jan 18, 2020 12:02 pm
I just started loading the 450 B in a RRR, so far from what I'm seeing I'm going with Reloader 7 powder and 300 gr. Speer Deep Curl bullets in Starline Brass with Fed. 250m primers. This combo gives me 1 inch groups @ 100 yards and I dug 2 bullets out of the sand bank they were shot in, both jacket and core held together, mushroomed to about an inch and one weighed 275 gr. and the other 282 grs.. Also the sectional density is 0.210 and that's what I'd prefer for a bullet like this going about 1900 fps. I'm going to try some H4198 powder and CCI 450 mag. primers with the 300 gr. Speer bullets to see if I can do some better.