i got my HAWKINS .50 CAL FLINTLOCKback in 1970.
we used rb for awhile on our bucks but went to 370 MAXI-BALL.
to this day, it is one of the BEST bullets for deer and very accurate in the .50 cal.
its hard to find them anymore, DONT USE THOSE MAXI-HUNTERS,they are no good.
i went to the 295 powerbelt hollow point, man, that bullet is accurate in .50 cal.so is 348 pb.
i like it in winter ,its easy to load and not messy for deer hunting.
here is my load.
geox 2f
80 grs.
1 bore button ahead of bullet
4f in pan
use the 6 o,clock hold on deer IF your sights let you sight in that way
fuller english flints 3/4
rmc v-peep sight drilled and placed at frizzen area
rmc hardened frizzen
295 pb hollowpoint
my rb load.
same powder as above by use 70 grs.
1 bore button.
.018 pillowtick patch
.490 hornady rb
bore butter or crisco on patch
bore butter lightly in barrel
summer only,winter i use hoppes bp on my patch /in the bore do to freezing.
hope this helps .
let a doe/fawn go where there are few