Its not so much about weight as about the length of your bullet. I loaded up some 53 gr TSXs for a fellow with a 1:12 .22-250 and the holes in the paper were badly yawed and the group was about 6" at 100. Back to moderate loads with 55 gr Corelokts, so they wouldn't blow up on caribou and back came the round holes and good accuracy. After that I couldn't convince him to try 70 gr Speers.