Nothing wrong with sticking to FFF 777. I use it with 110 grains loose sometimes. In comparison to other FFF-FF rivals, 777 yields the least amount of added 777 pressures.... energy probably equal to an extra 5 grains of FF using under 90 grains -- energy probably equal to an extra 10 grains FF when using 90-120 grains.
I do not recommend 120 grains 777 FFF, but the rifle can handle it as well as three 50-gr. pellets. My favorite load right now is 105 gr. 777 with a 240-250 bullet.... 90 gr. with a 200 gr. bullet.
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only reason I objected is because your post is not clear. You also make no mention of manufacturers in your post. CVA for example says no more than 90 gr of loose 777 even in their "magnum" guns (asked right after 777 pellets came out).
Also since you referenced Hodgdon, 100 gr of any muzzleloadingpowder they make is max in any 50 caliber. But as I mentioned above not all gun makers allow that in their guns.
Before you make broad assurances you need to clarify things. Erring on the side of safety is the only responsible thing to do. There's absolutely no way to know what everyone reading these posts have for muzzleloaders. I wonder how many of them even know what muzzleloader your using. When I read that post I had this picture in my mind of someone trying it with their CVA and making a visit to the hospital. What's worse it would have been their fault for not verifying the data prior to use.