I am just starting to work with a Falling Block Works Model J action with an unknown barrel that measures 316/324 with a 1:10 twist.
There is a thread going now in the Single Shot Rifle section on the 32/40 caliber, but it leaves me wondering. Several members here and on the linked ASSRA site suggest their pet loads with 4227. Do they mean Hodgdon's H4227, which I guess is discontinued, or IMR 4227? Do they interchange?
I currently have a Lee 175gr GC mold and have a 200gr ordered from Accurate Molds. Wow, he is putting three different cavities in the same mold block. I am impressed.
All I know so far is that Unique does not work for the 175gr boolit in this rifle. I plan to try enough FFFg and FFg to get the boolit out to the lands, but smokeless powder and load suggestions would be appreciated.