You need to read your owners manual to figure that out. Black powder is measured in volume and not weight. So if you actually weighed 100 grains of FFG Black powder out it would have more volume than Pyrodex or 777. You just need to work up the loads for your rifle and not depend on what works in somebodys elses ML.
In my TC Omega I used 110 grains of Triple Seven (1 50 gr pellet and 2 30 gr pellets) to push a 245 gr Barnes Mz bullet. Recoil was reasonable and accuracy was great. I used the same charge weight with loose Triple Seven as well.
It's by no means a maximum load but I like a 295 grain hollow point powerbelt in front of 100 grains of loose 777. Seems to work well and it dropped my mulie last year just fine. I'm just hoping I can get out to chase them one more time before the seasons over.
Over the years I have seen several elk and deer hides left in the woods by hunters and I have to wonder why they do this? I fully understand and agree about getting the hide off the animal as soon as possible to cool the meat, but why not pack out the hide with you and use it? As far as I know there are no state laws that require you to take the hide home, but to me why waste such a beautiful part of the animal? Some might think they have no use for the hide or it costs too much to tan....