I found out the hard way that no luck either with 142 smks, trying several loads I couldn’t produce anything better than factory ammo results, not bad but not great as I want clover leaf results. So... after several loads and some experimentation I found the 123 grain Scenars work really nicely with both 38 and 39 grains of varget. The 39 grain load producing one group that was 0.16 out of three shots. I will cook up more of these loads now that my Lapua brass has arrived and see what kind of SD I am getting at long range and not just the 100y line. Shame as I have 500 smks laying around from my 260. I’m sure there probably is a way to make the 142s work but it will take more work, in the meantime if I can keep the 123s going at 2800 FPS then they will be sub sonic out to 1200, plenty of distance. At some point I will try some Flatline projectiles and report back.