We tend to equate larger caliber with heavier - but that long hole does a lot to lighten a barrel. As I have grown in wisdom (that mistake/experience/judgment/wisdom/years cycle), I have backed away from the larger calibers. Or, started loading lighter. My .62 flinter (VA rifle) was delivered to me with the counsel to use 140gr for elk. Hoping this week to work a far lighter load. The recommendations above for lighter loads are good. The more I think about a .62 Hawken, the more I think, "yeah, that would be cool." But I haven't worked up the load for my .53 yet, so first things first.
Should work up to be a nice rifle.
David
NM