If you go with pure lead ( PITA to locate ) the bullet will set up into the bore.
Pure lead will expand far more and faster than you would think.
I've an oddball revolver ( OK, a few oddball revolvers) that doesn't have the
step in the cylinder. A pure lead .430 bullet will expand enough jumping the 1/2" or so from the case to the .430 bbl enough that it will leave a trimmed ring of lead that will clog the action.
A BP substitute like Unique should bump it up to fit a ragged old bore.
I've a raggedy bored Win 94 38-55 myself. Load mine hot and it'll blow the bullets through without getting the proper spin and it'll keyhole.
With helpful folks from here, it's put 6-8 deer on the gambrel. The farthest shot was 290 paces; on a wounded deer, I'd never try to shoot a deer at that range with a 38-55...but it knocked it down.

This deer was shot
5 times with Win factory jacketed loads ( about 120 paces ) ; it ended up bleeding out, just no expansion or killing shock upon hitting. Pure lead handloads work
way better, PITA but if you want easy buy a new Savage bolt action canoe paddle.
But stay with BP or BP subs. That's what these old guns want, along with the pure lead bullets.