http://castboolits.gunloads.com/show...nk-so-try-this
Was reading this while trying to work through a 9mm issue...
I am sizing down my boolit in the 9mm case. WCWW all the way to ACRange Scrap.
I have a few methods i use based on the alloy (different expanders to save boolit as best as possible)
Basically, my .356 WCWW gets sized to .355, and the .358 ACRS was getting sized to .353 (keyholing), and now .355 (new expander).
The WCWW shot considerably better (same loads 1020fps, within 20FPS, 3.9 grains HP38) than ACRS which are starting as larger diameter
(both squeezing down to the same diameter in the end)
Both PC with Smoke's.
Curious if there would be a reason for better accuracy in the harder boolit. All other factors are the same, minus the expander used.
i ask because I would like to be able to use RS as a primary alloy due to availability to me at this point in time
forgot to add... barrel slugs .355/.3555
I was thinking the RS would obturate better than the WCWW