It's a 32. The load that produced that target was 25 grs goex 3fg, ticking patched Hornady "0" buck, ballistol water mix for lube, and prime with null B. That target represents probably the best I've ever shot group wise at 25 yards.
The rifle was put together mostly by a friend because I didn't have time to do it myself. I ended up tweeking the stock shape and applying the finish. It has some age on it. If I'm remembering correctly the barrel is a Montana 13/16" straight sided. The stock was a pre-carve Pecatonica second that I dug out of the pile at Friendship. The triggers are Davis and it's a Siler small lock kit that I put together myself. Overall' it's a very fun gun to shoot.
Really good, Wobblyshot looks great! How's it shoot off a rest at 50yards?
I found my 38", .32 would do similar to yours above, at 25 yards using a mere 20gr. 2f, however at 50yards, that load opened to about 2 1/2". In order to tighten the group at 50 using the same lube, patch and ball, I had to increase the load to 35gr. at which it would put 5 into 1 inch, but no better. Increasing the load further opened the group, decreasing the load from 35gr. opened the group. I found that merely using 35gr. all the time, solved the accuracy problems at longer ranges. I also had to increase to 40gr. for an oiled or greased patch to maintain accuracy and that did well on the 100yard targets too. Just have to listen carefully for the "tink". That little 42gr. ball does not make much noise when it hits a heavy steel target.