Crow Mag - You've got me rethinking my idea of a 32 inch Lilja target SS 1.250 6 inches then taper to .875 or so using Lapua 338. My thoughts also included a 2 inch brake bringing the barrel length to 34 inches.
Correct me if I'm wrong. We did some extensive testing in .277, .284, & .30 using the heavier bullets in each class. Comparing identicle loads using slightly hotter powders like 4831,r-22, 7828, MRP in 24 inch barrels vs. 28 inch.
Then and slower powders like 7828, h1000, r-25 h-870 in 26 inch vs 30. We were looking at chrono readings and the gains of FPS with optimized powders for barrel length. Of course it proved that a longer barrels can take advantage of slower powders and have increased FPS.
What I did find is that the speed between 28 and 30 inch followed the law of diminishing returns. That's why i kind of limited my barrel idea to 32 inches.
Your planing on 40 inches. Am I wrong in thinking that the speed increase is minimal over a 34 including a 2 inch brake? [img]images/icons/confused.gif[/img]
[ 11-09-2004: Message edited by: budlight ]
.270 Ackley improved 29 inch 1.250 dia. target barrel 7mm STW 28 inch 1.250 target barrel. I also love my .458 mag for varmints and the biggest game in the world.