If you have a Sierra and/or Speer Manual, could someone please lookup the .260 rem and tell me the test barrel length, and what is the highest velocity on max loads for 142gr SMK and 140gr Hotcor bullets?
What does Sierra recommend as the "accuracy" load?
Nosler shows a 24" 1:9 with N560 at 2830fps
Hornady shows a 24" 1:8 with all powders at 2700fps
Barnes shows a 24" 1:9 with no 140 class bullets
Strangely, the lapua/vihtavouri data lists a 18.75" 1:9 with N560 at 2586fps.
Hodgdon's site (no barrel data) 140 partitions & IMR7828 at 2755fps, 142 smk & H4831 at 2747fps
Bottom line, I've got a 26" #10mtu fluted barrel and 139 scenars on order, debating on dropping down to 24" to trim muzzle weight. Sitting in an A3-5 adjustable, I'm concerned about being muzzle heavy. I'll have to chat with the gunsmith tomorrow a.m...