I'm loading for 303 british and 7.7 jap using a lee c312-160-1R powder coated and sized .311. I mostly reload with IMR 4064 but can't find any around me.However I do have a few other powders on hand,so question is where to start?I have a 1/4 lb IMR 4350, IMR 4227 3lbs, DuPont 700x 4+lbs,lil gun 1lb,unique 2lbs. I have seen others here using these powders for 303 brit but I'm not sure what ''group think'' would be on best runner up powder from this bunch.