Velocity

[Gman]

I borrowed my friends Shooting Chrony Gamma model to find out my velocity, and wonder if this sounds right. Trued Rem. 700, s/a, in 6BR,.271 neck), 28" long, Krieger HV, .237 bore, 1 in 8" twist, throated for 105-107 pills. Lapua brass, CCI 450 primer, 105 Berger VLD,,jumped .020), 31.0 gr. RL15,,no signs of pressure) Velocity is between 2767-2801. 5 shots at 100, in .25 moa, but barely under 1" at 300, with some vertical. Should I increase powder charge in 2/10's gr. increments,until I get hard bolt lift) to try to eliminate the vertical at 300 yards? I am not turning necks, but should I be ? I am neck sizing with a Wilson,.268 bushing), bumping the shoulder with a Redding body die, and seating with a Wilson. I would like to buy my own chronograph, but unsure of which one to purchase.

 

[Gman]

I broke down and bought a Pact 1XP Chronograph, and here are my best results. 31.8 gr. of RL 15, 105 Berger VLD jumped .020. AV: 2875, ES: 13.9, SD: 5.1, AD 3.4, 5 shots under .250 @ 100 yards. My question is, will VV N540 give me more velocity than RL 15?

 

[wnroscoe]

I was shooting 30.8 grains of RL-15 with the 107 SMK's and the F205M's. My velocity was 2,928 and this was the max in my rifle. On a whim, I tried the VVN140. The charge was 30.8 also. My groups tightened up, my ES & SD went down and I only gave up 10fps in doing so. I also tested the Lapua 105's from my rifle and found them to be of no marked advantage as the velocity was the same as the 107's when they started to shoot. I changed my charges 2/10's at a time when runnig my ladders and found that to be adequate. If your not getting pressure go up slowly if you like, I'd stop when the rifle started to shoot or you experienced pressure. It seems like my rifle shoots better at 300+ yards, you might move out to at least that for your load development, you might be suprised.