Just curious about how fast the RUM would push a 190 atip in a 26" barrel. I'm sure it would be a very long loaded round if seated above the shoulder & neck junction. I'm guessing close to 4" long.My brother runs 190 Atips. N570. I ran the the 190 Atips in my last barrel. I was using H50BMG and RL 50. Had problems with the barrel. Sent it back, and got a new barrel. Decided against shooting the A Tips. If you want some load data, PM me.