I went to the range yesterday to test some loads in the 1905 MS. I sized some Hornady Interlock .358 250 grain spire point bullets to .354 and .355 diameter. All loads were with 48.0 grains of IMR4064. Looks like I have a winner. This 3 shot group was made at 50 yards with my peep sight using .355 diameter bullets. This old girl is going to be with me in the PA woods this year.