Colt Model 1909 US Navy Double Action .45 Revolver

[varifleman]

Under the grips are “JH,” “N” and “4” stamps; "N" for Navy contract, "JH" and "4"inspector's initials and number?

[RCS]

You can use 452/453 dia lead just make them hollow base - worked find in a S&W M1915 that was rechambered from 455 to 45 Colt