View Full Version : jlk bullets anyone?
08-24-2011, 03:07 AM
was wondering if anyone had any exp. with the jlk vld 6.5 130gr bullets they are showing a b.c of 620 heres a link http://www.swampworks.com/jlk/
08-24-2011, 03:28 AM
Good bullets, BC is overstated. Essentially the same bullet as the Berger 130, and Berger lists the BC as .552. Both are made with the same dies, so I tend to believe Bergers numbers, with Bryan Litz doing both computer modeling and actual testing of the bullets.
08-24-2011, 04:05 AM
130gr is a bit much for the Grendel, to be honest. Can you throw it out the end?...yup, but the velocity will limit you to a much lower real-world BC that can be beat by the 123's and even 107's/108's. The listed BC's for the Bergers are for speeds at over 2850fps I think. I've run those 130's out of my .260 at 2820-2850, way over book using N540. Probably not the best idea for my rifle, but I was pushing it to get the trajectories I needed. There's no way we're going to get those velocities out of a Grendel. BC is highly dependent on velocity. The Bergers are also very temperamental in auto-loaders, since we're limited to mag-length jump constraints. You will probably find much smaller accuracy nodes with them out of a gas gun. I did find a few .75 MOA 5-round groupings with them out of the .260, but nothing like a Scenar or SMK. Most groups during load development were closer to or above 1 MOA, and I have a CNC cut-rifled 5R Bartlein done by GA Precision. With 139 Scenars, I found several sub .4 MOA loads for 5-round strings, even when I shot as quickly as possible.
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