Some of my own favorite plinking loads are 148 grain wadcutters over Unique or 231 and 158 grain LSWC over 231, Unique or 2400 .
I read your question about 296 last night so I looked through my notebooks. I don't even like 296 for full power magnum loads. It seems to produce too much flash and bang compared to other powders. I should show you the underside of the top strap on my GP-100. There is clear frame cutting from my experiments with 296 during my misspent youth.
Жить стало лучше, товарищи. Жить стало веселее.
Life has improved, comrades. Life has become more joyous!