Ruger old army is the way to go I can load 43 grains of triple 777
wad and a grease cookie and a hornady R/B and at at 50 yards can hold a 4" group.
The triple 777 powder can be compressed in pistol with out any problems
The ruger old army only has one problem the front sight at 50 yards seem to shoot high.I pick up a new rear blade filed it down about 1/8 shorter then stock works excellent
I would say at 50 yards no deer will walk away from that load as long as bullet is placed in the right spot