Jbar4Ranch did you have the problem I had using 451 with the belling die making the case to large below the bell. I ended up using a very firm crimp to hold the ball in place.
Didn’t think about the grease but it was so slow I didn’t get much leading. Might be different with your 850 fps.
Did you use any filler?
Thanks for the input.
It was a sad day when I discovered my universal remote control did not in fact control the universe.
Did you hear about the latest study.....5 out of 6 liberals say that Russian Roulette is safe.