I never could get .224 bullets to do anything but keyhole out of my 1917H, save the 63 Sierra SMP which patterned them like a shotgun, but at least they hit the target going straight instead of tumbling. I must have tried 30 different bullets from the 35 grain VMAX to 75 grain AMAX. It shot several true .228 bullets just fine, but they are getting difficult to find.

I finally broke down and had the bbl lined with a .224” 1/10 Douglas. I haven’t played with it much since then though.

The .228 (70 grain?) Sisk shot good and was a killer but I got tired of searching for old stock bullets.
[Linked Image from i.imgur.com]