I used some old Speer 180 gr bullets
I've used those for 40 years but I can't find them around here now. All I could find this year was 165's and they won't shoot worth a darn in my 300 WSM.
So far the recoil in the 300 doesn't bother me as long as I wear a PAST shoulder pad when practicing. I'm only good for about 10 shots without it but I've shot 30 or more with it.