Speer 270gr 9.3's were super accurate and deadly on WTails at a max load of RL15 out of a CZ550 for 10 years for me. 1st 4 rounds with a 3 gr under max break in load gave me 3 rnds touching and a "flyer", with all 4 covered by a quarter.
Miss the 9.3 CZ, don't miss the heavy arsed rifle out in the field, so it became a box blind shooter that a neighbor lusted for for 2 years and finally talked me out of it. His first shot on game at a 250 hog at 240 yards was spot on DRT.
Ron