John is correct, as velocity goes up bullet hardness has to go with it. Although I prefer to shoot my cast bullets as soft as I can & still get accuracy once you go so far speed wise you have to raise the BHN of your bullets.
Here's 3 different targets I shot with one of my 480's a few years ago just to prove a point. The first target is 25 yds, the second target is 50 yds with 2 shots going a tick low but still a decent group at 50 yds with iron sights.
The third group is the same load but the bullets weren't water quenched & you can see how the group opened up, even at 25 yds.
It all goes back to matching the hardness to the velocity. Almost forgot, Idaho is probably having it's first Grizzly hunt in over 50 years this fall, hope I get lucky! Only 3 hours away!






Dick