I had the M-29, 8-3/8" barrel and the best round I used in her was the over the counter 240gr SJHP Remington rounds.. I tried some 170gr Federals but I couldn't hit a thing with them!! With the 240gr though,, Totally different story!! 6 rounds in a fist sized pattern @50yds!!

So I stayed with the Remington's!!!!