I recently acquired a 460 20" Katahdin Encore barrel. I know it's a rifle, but I figured the handgunners would have the better advice in this scenario.
I tried two Unique loads with 454 brass and got two completely different impact points on the target.
If I load 10 gr Unique with 300 gr bullet, the bullet impacts 10" above bullseye at 50 yards.
14 gr Unique with 300 impacts close to bullseye at 50. Similar results at 75 yards. I would kind of expect the lighter load to impact just a hair lower than the heavier load. And the groups are horrible. I would like to stick with unique, but I will try something else if I have to.
I had to adjust my peep sight all the way to the right and bottom just too get these results. And my sights are nowhere close to matching my bore sight. Is this common to see the impact change that much at 50 yards between these loads? Is it because the 454 in the 460? I don't currently have any 460 brass right now to try.
I also had a lot of lead fouling happening at the breech side of the rifling. Bullet is a cast performance 300 gr gas check. i ran some XTPs through the barrel with out fouling, but same accuracy issues.
I tried two Unique loads with 454 brass and got two completely different impact points on the target.
If I load 10 gr Unique with 300 gr bullet, the bullet impacts 10" above bullseye at 50 yards.
14 gr Unique with 300 impacts close to bullseye at 50. Similar results at 75 yards. I would kind of expect the lighter load to impact just a hair lower than the heavier load. And the groups are horrible. I would like to stick with unique, but I will try something else if I have to.
I had to adjust my peep sight all the way to the right and bottom just too get these results. And my sights are nowhere close to matching my bore sight. Is this common to see the impact change that much at 50 yards between these loads? Is it because the 454 in the 460? I don't currently have any 460 brass right now to try.
I also had a lot of lead fouling happening at the breech side of the rifling. Bullet is a cast performance 300 gr gas check. i ran some XTPs through the barrel with out fouling, but same accuracy issues.