@grandpamac When I was loading for the 270 many years ago my best load was .5 grain under max using H4831, Regarding mid loads; I'd say a mid load for the 303 would probably be about the equivalent to the factory stuff as a guess? I'll go 1/3 of grain with the SMLE though,
When I loaded for the SMLE I used IMR4895 with a Hornady 174gr RN, I used just over minimum as it was a bail gun for pigs. However I did head shoot a fallow at about 150m with open sights with it and that load.... Trajectory was probably artillery-like... The word "fluke" comes to mind...But I was young and dumb...
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