Dunitall,
Per Ciwsguy's observation, you may want to slug your bore and learn it's true groove diameter. Figure that jacketed bullets should be at least equal to that for good accuracy. Lead bullets are usually sized 0.001" over, but my Marlins and revolvers all seem to prefer about 0.002" over for accuracy.
H110/296 (both are canister-grade WC296; same powder, different brands) is great, but seems most consistent with magnum primers. If you don't have magnum primers available, Alliant 2400 does very well.