Took my T/C Cherokee .32 out today after reading Semisane's post on his powder pig. I put a 4 dot target out at 25 yds and shot my first 3 shot group with 25 gr of FFFg, .310 RB and pillow tick patch, olive oil lube. Not bad, what it normally did.
Then I bumped it up to 30 gr. Wow, all 3 balls touching. OK, shot 3 with 35 gr. Group got a little bigger, but could have been me. Now let's try 40 gr. Hmmmm, about the same as 25 gr.
Now I was alternating here between my .32 and my 50 cal so neither barrel would get too hot.
I moved the target out another 10 yds (to 35) and shot 5 shots using the 30 gr charge. Sequence of shots were #1 12 o'clock and 2" high; #2 just to the left-almost touching; #3 just to the right of #1-again almost touching; #4 cut hole #2; #5 right below the group about 1/4". The entire 5 shot group was just about an inch C-C.
Looks like 30 gr is this rifle's sweet spot. This is a new barrel too.