I went to the range today with my supply of 3F GOEX. I've had a pound of this for a few years when I tried it in my 50cal pistol. My pistol prefers 2F. (Go figure)
So, the first pic is 60gr, then 65gr, and the final was 70gr. I only shot 2 with the 70gr as that's all time permitted today. I used Ballistol for a wet lube and used only .018PT. These results were much better than previous outings.
I set up the target at 50 yards this time as I just figured I'd see how well 3F would do. It proved much better.
My initial thoughts are 65gr may be the right load. This is a youth rifle and I had cut the barrel length to 30". So, unlike a "normal" BP rifle, this one doesn't have the additional length to burn more powder.