Ahhhh....another fan of the SMLE. Nice MkIII. Outstanding group. Heck, they are all nice. 4064 works nice in the .303, but I've gone to 4895 because my M1 likes it, and anything the M1 likes, my 03A3 likes. So, I just stock 4895 now as it also works well in just about every other rifle calibers such as 7.92, 7.65, 7.62X51, 7.7, and on and on. Perhaps not ideal in some, but good enough. I've shot 150 grainers in the past, but just stick to the 174BTFMJ now. Just for fun, I do load a 123 grain bullet to shoot in my Bogus "Jungle" carbine.