kevmc
04-18-2013, 07:06 PM
I cast some 429640 HPGC out of straight lead.
Sized to .431, load and pull.....from crimp groove to GC now .429.
Front band still at .431, gc still at .431...middle undersize at .429.
accuracy about 3.5" @ 50yds with 2x scope/bags.....SW 629-4 PC scope only gun.
Tried same with some BT's plain base (bhn 21) I had around, and these did not resize.
Tried with a comercial hard cast SWC (bhn about 18), and these did not resize down either.
Loaded 1st bullets (pure lead) into fired cases that I belled just enough to remove remaining crimp.
Roll crimped and pulled these and they resized to .429 from crimp groove to gc again.
So, the crimp is resizing straight lead bullets from CG to GC.
I'd like to keep these as soft as possible, but think I'd do well to harden enough that they remain full size when passing crimp.
Going to mix some 50/50 Lyman #2/Lead (bhn about 12) and try that.......
Anyone have thoughts to share........
We'll just assume up front that I'm nuts and go from there!!!!
Sized to .431, load and pull.....from crimp groove to GC now .429.
Front band still at .431, gc still at .431...middle undersize at .429.
accuracy about 3.5" @ 50yds with 2x scope/bags.....SW 629-4 PC scope only gun.
Tried same with some BT's plain base (bhn 21) I had around, and these did not resize.
Tried with a comercial hard cast SWC (bhn about 18), and these did not resize down either.
Loaded 1st bullets (pure lead) into fired cases that I belled just enough to remove remaining crimp.
Roll crimped and pulled these and they resized to .429 from crimp groove to gc again.
So, the crimp is resizing straight lead bullets from CG to GC.
I'd like to keep these as soft as possible, but think I'd do well to harden enough that they remain full size when passing crimp.
Going to mix some 50/50 Lyman #2/Lead (bhn about 12) and try that.......
Anyone have thoughts to share........
We'll just assume up front that I'm nuts and go from there!!!!