I had been trying all kinds of loads for my rifles using combinations of powder, boolits, primers, etc.
and here I've got some results that may be able to do the job:
H&R single shot rifle in 444 Marlin: 310gr Lee RF, GC over 13.3 gr of Red Dot and WLP primer
Browing BLR rifle in .358 Win: 162gr Lee SWC, GC, over 18gr of 2400 with WLP primer
H&R Single shot rifle in 357 Maximum: 162gr Lee SWG, GC over 19gr of 2400 with CCI-400 primer
I am still working on the 357 Max but this was my best group with it so far.
Camba