I really doubt that an Encore barrel is long enough to burn 100 gn. of BP, but if your looking for a hunting load you could start there and work up and down for accuracy. With BP you will not be able to blow the gun up unless you put in several bullets. With 1 bullet and to much powder you will just lower your velosity and increase recoil. Well you`ll through alot of fire also. I would guess that you`ll get your best accuracy some where between 80 and 100 gn. of BP.