sure they are both 50 grain.As long as they fit in your barrel your fine.
Either FFFg black powder or Pyrodex P may be used.
First, find a copy of the owner's manual for YOUR pistol. Second, use ONLY black powder, or a modern black powder substitute, such as Pyrodex. The ROUGH rule of thumb is one half the bore diameter in grains of powder. A .32 cal would use ABOUT 12-16 grains of powder.
The Wolf Magnum is rated for 150 grains maximum charge and designed for use with Pyrodex pellets or similar pellet type powder and 209 shotgun primer ignition.
The C-11 shoots .177 Caliber BB's not pellets
.177 cal. Crosman, daisy, rws, beeman, marksman all make pellets in the .177 size
The Crosman Phantom is designed to shoot ONLY .177 pellets NOT BB's, they will ruin the rifling in the barrel.
Use Waddcutter pellets, or Target pellets. Don't use BB's for target practice they are not as accurate as pellets. BB's are okay for plinking.
For a 44 cal pistol (not revolver) between 20 and 30 grains of 3F black powder or black powder substitute (like pyrodex or goex pinical) should do the trick. You will have to adjust the load to do what you want and to shoot the distance you want, but that should get you started. The above answer is stupid. Since most black powder pistols ARE revolvers. Fill the cylinder half full or a little more, if you do not want to play around with a grain counter,waste of time.
Quick disclaimer load the rifle according to manufacturer load data. what is safe in my rifle may not be safe for yours. There that part is done. That depends on what the stag horn mag rifle likes. The rifle can safely handle 150 grains of powder. black powder is measured by volume not weight. I have a staghorn mag. in 50 cal and it likes 100 grains of pyrodex pellets. I have shot 150 grains of both loose pyrodex and pellets but with no great accuracy. All because the rifle can handle 150 grains of powder doesn't mean it will shoot your bullet accurately. My rifle likes the 100 grains and I get decent groups. There are other factors as well bare in mind different bullets and will shoot differently too.
6.35 mm is equivalent to 25 ACP
If you are asking about a BB gun, Then they are inherently inaccurate. If it's a pellet gun, then use heaver pellets. Yes Pellets come in different weights. Heavy pellets fly slower but much straighter than light weight pellets.