I am using a RCBS 375-250 mold casting bullets that drop at .376 to .3765 from an alloy of WW and a bit of tin to make a bullet showing a hardness of BH 12. I am sizing to .375 with a Lyman H&I .375 sizing die in a RCBS Lub-2 press. I am using a homemade lube of beeswax, tallow, and olive oil.
I find that the bullets are next to impossible to get in and worse out of the sizer die. When I can these measure a frog hair (.0002) over .375. I have had to drive some out with an oak block and a hammer...
Any idea what is up here?
I have used the same alloy for 45 cal bullets and it sizes like a dream.
Anythings to check?