Same here, back in the mid '70s had a 4" M28 converted to 44 SPL. Shot many Lyman 429421s over 16 gr of 2400 through it but mostly the same bullet over 5 gr Bullseye. My hands just don't get along with N-Frames and heavy loads so i traded it off years ago. Sorry, don't remember who did the conversion or the cost.....