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.
There are still some who insist a scope is not needed for the type hunting they do, ignoring the advances of the last 150 years in optical sights. (Even the ultra-conservative US Army has adopted optical sights.) The idea that in some special circumstances open iron sights or aperture (peep) sights might be more useful is not lost on me, but with the inevitable advance of age comes the reduction in visual acuity needed for using iron sights.
I believe that many who completely resist the idea of...