Lyman's states:

Our maximum loadings for the .50 caliber rifles;
.495 RB 110 grains of FFg or 90 grains of FFFg
240 grain sabot 100 grains FFg or 90 grains FFFg
335 grain sabot 100 grains FFg or 80 grains FFFg
420 grain Maxi 100 grains FFg or 80 grains FFFg

What types of powder charges have you found work well (target and hunting) in your Lyman's Deerstalker/Trade Rifle/Great Plains Hunter? And do you have any muzzle velocity #s for that?

If an accurate load is well below max it seems the load would be very anemic. I'm guessing in the vicinity of 65 grns 3F behind a conical, and 55 grns if it's 777 (3F). Is that about right?

I found that a RB for 44 cap n ball guns has a BC of .064. Does this number stay the same despite caliber? Anyone know what the BC of RB is for a .490-.495 in a rifle?