onondaga
posted this
04 November 2012
http://www.castbulletassoc.org/view_user.php?id=5941>CANUCK:
Use data for the same bullet weight as your bullets weigh or for the closest heavier bullet weight.
Sure 748 will work, but when you get a chance, try H4895, 308s like that better with cast because of lower pressure with H4895.
I cast the same Lee bullet with #2 and mine all up weigh 171 gr. 34.1 grains H4895 shoots that bullet in a .308 well and just over 1MOA for my grandsons Savage 11/111. Velocity is just over 2200.
Do not trust what lead bars are labeled unless they are certified alloys from a reputable dealer like Rotometals.
The Lee Hardness Test Kit is a good investment to help you with hardness testing of what you buy and of what you alloy yourself. Just adding wheel weight to what you have is a blind guess without measuring hardness. Test what you have and what you want to add, then you can do the math and get the hardness you want. Make sure no samples for testing were quenched and that they have age hardened sufficiently before testing.
Gary