Discussion in 'Blackpowder' started by TOOT44, Jan 5, 2022.
Kind of a dead horse anyway as no new inventory has been available for years.
Sez you, i say different.
First seven rounds from new re-bored to .54 caliber Navy Arms rifle with 1/66" twist rate rounded groove bore. Powder charge was 90 grains of Black MZ powder. First shot went right and i adjusted sight. Second shot went high and i adjusted sight again and fired this five shot 50 yard group:
thank you for that info. I have never heard of that powder, SHOOTERS WORLD. going to try and find some. all listings say out of stock!
I shoot these guns to know what it was like firing them and their original ammunition in the 19th Century. I have no interest in firing them with wimpy CAS level loads. If I keep this S&W 2000 long enough to shoot up the ~ pound of Black MZ I currently have I'll try to get some of the APP powder for the Schofield. For everything else I exclusively use the real thing.
My cowboy loads are not that wimpy. In this video I shoot my BlackMZ loads beside compressed load of FFg Goex. I didn't chronograph the loads but you can see by the recoil that they are substantially equal.
what do you do to eliminate the clumping problem? does it occur after every use?.
I just vigorously shake the jug until it's mostly loose, but eventually a small remaining clump will block pouring with my jug spout, so I just put some into a small container and dip into it from there. If I used it frequently it probably wouldn't get a chance to clump so much. I only keep it for backup powder, and rarely open it. It might end up being fertilizer.
My solution to the clumping problem: i bang the can against a solid object a few times. Unopened cans sometimes clump, the clumping is primarily related to particle attraction rather than moisture.
Never used Black MZ in black powder handguns.
When used in rifles; Black MZ, like all the APP powders, requires a tight fitting projectile seated hard on the powder. i put a golf ball on the ramrod and really lean on it. Then i whang it once with the heavy ram rod.
APP sent out mixed signals on the effective use of their powders. After JSG came out, APP stated that it was not necessary to compress the powder. A failure to compress any APP powder leads to large swings in extreme spread and standard deviation for velocity.
Some time ago i fired ten rounds of 100 grains of Black MZ under a 250 grain SST bullet in the black smooth sabot clocked by my Magneto Speed. The standard deviation for velocity was 14 fps.
Since I am currently shooting it in a black powder cartridge handgun would you care to explain this pronouncement?
It ain't a pronouncement. i have no experience with Black MZ in black powder handguns.
Years ago I had some either Clean Shot or Clear Shot (don't remember which) that was the same way!
WOW!~ the pictures rely make me see what you are talking about!! in that state is / does it degrade? will it go off after crushing it? what makes thei happen to it? real BP, can stay in it's original state for years!
It's an ascorbic acid based powder so it draws in moisture and clumps. It has an additive in it that helps it break up a little though. Ascorbic and sugar based powders do this, some more than others. In the 90's I bought some "Black Canyon" powder. That stuff didn't last a year before it turned into gum. It was ascorbic acid based.
Why are the powder grains in the lower picture so much larger than grains in the clump?
Separate names with a comma.