Well, guess I need to check in on this topic. I have probably had a half dozen .62's over the years, so I know a bit about them. Currently I shoot a English Sporting Rifle in .62 cal, 32" 1 1/8 to 1" taper, with a 1:104 twist, .006" deep. For general target and all around plinking, I run a .610 ball, .015 patch and 135 grains GOEX Ffg. Hunting I would run 200 grains Ffg with a 20 ga cushion wad over the powder to preserve the patch. In my chrono testing that gives about 2,000 fps.
I am a fair size guy, 6' and 235 pounds and not terribly recoil sensitive. I find that load to be quite comfortable to shoot, and frankly find a .54 Hawken style rifle with 85 grains Ffg much more abusive to shoot.
To me, it seems your rifling rate is going to be something that should be talked about. Granted, the faster twists are going to require less powder to group and the slower rates will require more. And handle more as well. But let's face it, when a person moves up to bore size rifles, typically, the amount of powder and lead it uses shouldn't be an issue. If it is, then .40's are a great choice.
It has been my experience that shooting rifles as I described, drop out to 100 yards is not an issue. Typically, most people unfamiliar with the rifle tend to overshoot the target. They expect much more drop than it delivers.
Guess that is about all for now. Go for the .62, it's a great caliber and pretty effective.
John