I shoot a lot of .36 Navies, having several 1851's of both the Pietta and Uberti variety. Owning a bunch of cap and ball revolvers, from pocket models to the Walker, I will state without hesitation that the .36 Navies are my favorite for just messing around and plinking. My guns shoot best with round balls, .375 for Pietta's, and .380 for Uberti's. Conicals are not a bad option, I've shot a bunch of them over the past 50 years, but I prefer round ball. In .36 caliber, round balls are very pleasant to shoot. If I am deliberately hunting and need the "power" of a conical, I would just go with one of several .44's I possess. Either projectile is historically accurate, and while am certain conicals were more widely used due to paper cartridges, round balls were not uncommon. I reckon it all depends on what you want to do with your gun, for just plinking, round balls are great. If maximum energy is your goal, go with a conical. BTW, while I don't recommend it, I did kill a large buck with my favorite (Pietta) 1851 .36 navy several years ago with a round ball. Clean kill at under 20 yards. Was not really hunting, but the opportunity presented itself as I was cutting wood during deer season, and that was the gun I had. Legal where I live, but not in every jurisdiction. I got a Lee mold that casts both a 130 grain conical, and a .375 round ball. Don't know if they still make such a thing.