Jim,
I can't believe a tough old bird like you could be bothered with the difference in recoil of those two loads. But I would chose the faster powder as well. Just for cleaner burning and more consistant pressures at low temps. My damascus load uses Hogden Clays. Clays is slower than Nitro 100 but still in the same range. My loads are consistant in velocity and report, but I don't know if they have consistant recoil, cause I don't think about it much.