I was checking load development with a number of different slugs, some J-word, some boolits, and the cast ones are what we like here, so here we go. All rounds fired from a front rest and 50 yards, no magnification, red dot only.
I had one load with a gas checked linotype HM2 boolit over 22 grains of Winchester 748 powder. Edited on 8/4 to correct charge from 21 to 22 grains, no idea why I typed the wrong one!
Function was flawless.
Now the one that really threw me was the Bator bullet. It was difficult to load with my Lee dies, and you can see the offset rings on the boolits from the seating stem. Run out was bad, so expected nothing whatsoever from them, just noise and smoke and with the short round and odd profile, a whole lot of jammed rounds.
As always, I am an idiot. My CZ BREN 805 fed and fired them without a burp, (she's a lady, never burps in front of company, and there were others on the line), and the results were quite surprising. No blowby on any loads, either, recoil similar to a jacketed round.
This bears looking in to, don't you think? Any ideas on seating them better?
Oh, and just for grins and giggles, I had this group...ain't that a heart breaker?