I SEEM to recall SOMEone on here was once, a couple years ago... talkng about loading something medium-size 30-caliber to subsonic or near subsonic velocities, and it MIGHT have been 7.63x39.
His basic approach was VERY unorthodox, in my opinion, but he swore by it:
he was loading very heavy for caliber pills, maybe even cast, and putting them in the case BACKwards (yes, you read that right... putting the pill backwards in the case...)
he said he was "doing a real number" on coyotes stealing chickens late at night at close range and such. I dont recall he was cycling the action or not, but this basic approach would probably work on single shot loading.
as i recall, I had like one or two stars at the time that werent blinking, and he had like all stars blinking, LMAO, so i wasnt saying a word like "you cant DO that...", 'cos he was no newbie, and i was.
it was a fairly light load. He said at close range thay flew better than one would think, as a bullet gets unstable when they slow DOWN at the end of flight to subsonic, hit/make turbulence, and tumble... but that projectiles get a bit of tumble out the muzzle as they GET to supersonic speed too, and that a pill starting out at subsonic speeds, never has to endure these bad periods (though the round was naturally a close-in proposition, he said the heavy Butt-first backwards loaded pill approach worked very well, and hit hard at close range with a heavy pill going moderate speed, that big blunt end striking first.
anyone wanna clean up my memory on this??? I KNOW i got the "general gist" of it recalled.
when you really think about it, and you plan to use a chrony and work DOWN in speed 'till youit SUBsonic, it all makes a bit of sense. The extremely heavy pill one would at first blush THINK would no way stabilize at such a slow speed in a weight/twict gross mismatch, but he said when starting out subsonic, the rules were slightly different, and the butt-first pill loading helped tremendously, and grouped better than you would think.
"Hey... someone keep an eye on 'Zippy'... I don't want him coming up behind us. You DO know he's talking, and LISTENING, to a paper bag, right ?"