So what speed did you see? 2800+ I am guessing.
Corrected velocity at 2870 fps......
Al,
Realizing barrels will vary a slight degree for increased velocity as they break in...Have you paid any attention to an average number of rounds thru a pipe before it settles into a consistent fps?
I like 180-200 rounds, then look for my velocity numbers, calling my barrel broken in good.
Mark,
I always, without fail, use a chronograph right out of the gate to help with load work. So many times groups & ES's converge at the top, before going over the cliff. Results aren't always in your face like that, so a chrono can help ferret out the place to be.
The 2nd group out of the gun with the 108's & 37.5 of Varget went 2865, & the Berger at 2862.
The following day it was 2837 & 2836. Then two 5 shot groups with Bergers at 2842 & 2835.
I never set the chrono up after that, and just went to shooting. I had about 75 rounds down the bore at that point. Generally, I think a barrel settles down around 150 rounds, give or take. I don't believe every barrel speeds up. I know some guys take barrels off when they lose speed, but my last 1000 BR barrel had almost 2650 rounds on it, and still chronoed the same as when new, before I took it off.
This barrel, as I started playing long with it, was beginning to have a tendency to shoot a little high, so I made notes as I went with correct drops, and adjusted the JBM printout afterwards. I may check it again, but the last time out it was perfect to 1360.
That day, I had taken 5 guns out, shot a pile of jugs, took a bunch of pics to make a new post, and accidentally deleted everyone of them.....dammit. Last of the day was a long jug at the 1360 mark. Dialed in the scope, called 5.5 MOA of wind, and shot. Elevation was perfect, but still a couple feet of wind short. I dialed in 7.5 of wind, shot, and it landed just short. Next shot went just over, fourth nailed it!
Basically shot the same place as this pic, but I had the jug way up in the field, upper edge of the dirt in the V above the barn, which was an easy place to spot. I actually hit it on the 4th with the 6x46 Lapua also.