Normal load for a 45 would be a 440 round ball with a suitable patch. If that isn't tight enough for your liking in your particular gun, you can always use a slightly thicker patch or a slightly larger ball. But I'd tried 440 balls to start with.
A good place to start is with as many grains as the cal. (30 in this case)and work up from there to find the load that gives the best groupings. I shoot 35 gr. for target and 40 for hunting and 45 with a mini ball in my 32's
In theory, you could load about 7000 grains of BLACK POWDER in a .54 cal. However, it would be a lousy load, and blow unburned powder all over. The largest charge is not necesarily the best- and will depend on whether you are shooting patched ball, maxis or sabot. 80-90 grains would be an average hunting load for a .54 with a maxi-ball, but do yourself a favor- contact the maker of your rifle through their website, and get an owner's manual- they are free.
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FFFG
To the best of my knowledge unless you are a convicted felon you can own a black powder gun.
Larger grain black powder, such a fG or ffG. Black powder substitutes, such as Pyrodex are not intended for use in propelling fireworks. Pyrodex R could be tried- rmember it is measured not by weight, but by volume.
Your best bet is to look on gunbroker or auctionarms. Most of Dalys black powder arms were made by Investarms (you will see a I inside a square on the left side of the barrel) search those names and compare pictures to your gun, you will have a good idea what they sell for.
Black surfaces with large area absorb heat best (a powder for example that is black).
The best pokeball to catch victini in white/black is the ultra ball or the great ball you shouldn't use the master ball.
Use the same amount of Pyrodex as you would regular Black Powder or as stated in the manual. The answer depends on what type of shooting you are doing. You would load maximum load if you want to kill a deer. Are you loading a round ball? OR a sabot round with a hollow point? I have another brand of Hawken .50 caliber and I load 90 gr. I use a .490 round ball with a patch that is 0.010 inch thick. Less would be acceptable if you are shooting at short target range. You should try various types of loads and patches and bullets with each gun to see what gives you the best accuracy OR the best knock-down power. You can always start loading the same amount of grains of powder as the caliber of the rifle. Start with 50 gr and fire some test rounds. The old codgers had a rule of thumb. Place the ball for the rifle on a table. Pour powder over it until the powder piles up high enough to completely cover the ball. Scoop it up and measure the amount.
It would depend on caliber, for a .44 caliber you would use a .441 to .445 ball, for 36 cal use a .362 - .365 ball or conical bullet, You want to have your ball slightly larger than the chamber size so when seated you shave a thin ring as the ball is rammed into the cylinder chamber thus sealing the powder charge from moisture and cross fire and giving the best performance with your load.
I believe so but I am not the best pool player...