ChrisAU, I have cut 2 barrels to 18" and 1 to 16" threaded for can's, 6.5 PRC, 18" 308 !8" .243 16", add 5 12" to 6 1/2" for the can, Of the 3 I use the 243 the most, as a jeep gun, all 3 shoot as well as they did before I cut and threaded them, But I have not run them past a chrno, Rio7