What speeds are you getting with 6mm br with 105s

[fm1947]

If you have a 1/7.5 twist or an 8 let me know and barrel length, I'm interested in the speed with 105 berger hybrid, especially at 30 inches

 

[Ltdshooter]

Berger 105 Hybrids in a 26" Remage / Criterion 8" twist barrel, I'm getting 2880 fps with 30.7 of Varget, CCI 450, and .012 off the lands.

Scary accurate (in the mid .2's) and zero signs of pressure.

I believe there is some room to move up from there which I intend to do when time allows to see if another node or two exists at faster speeds.

 

[Mozella]

Berger 105gr Hybrids in a 28" Shilin 1:8 twist barrel with 30.58 grains of Varget and CCI 450 primers with a .005" jump gives me 2959fps.

A similar load using 30.18gr of IMR 4895 gives me 2893 fps and accuracy as good or better than the Varget. Most 5 shot groups at 100 yards are in the 3's some in the 4's and some in the 2's.

 

[Eagle1899]

Berger 105 Hybrids .010 jump
26" Spencer 1-8 twist
31.5gr 4166 CCI 450
2,970 avg

 

[Canadian bushman]

I was getting around 2840 2850 with a 1:7.5, 30" krieger pretty comfortably.

 

[4xforfun]

When Fire Forming my BR brass to dasher brass I ran 31 G of Varget behind a 105 BT. 1 hole groups at 2920. 1-8 twist at 30 inches.

Tod

 

[fm1947]

GREAT THANKS EVERYONE !

 

[DanSavage]

I run a light load of 28 grains of Varget, 107Smk lit by br4's in a 26" Bartlien 8 twist for comparison, it runs 2750.

 

[byrddog]

I'm running 4 different BR barrels. 3 bartlein and a proof.
Proof is 21" and a 7 twist- 29.8 grains of varget yields 2797 with 105 a max
The bartleins are all 5r 8 twist. 28", 27", and 25" I'm running all of them at 29.8 grains of varget. Velocity on the 28" barrel is 2870, 27" barrel is 2850, and the 25" barrel is 2860. Running the 105 berger hybrid in all them. Seems to be a sweet spot for me between 2850 and 2880 with really good x counts in f class at 1000 and 600. I'm getting low sd's in all four of these barrels. I do have a .267 neck in my chamber on the bartlein barrels. I've never chased velocity much as it's harder on brass, carbon fouling and the gains in wind drift are minimal. Also seems my accuracy node window is much larger at these velocities.

 

[Steelnecktie]

Hawk Hill 25" 8 twist 30.2gr. Varget CCI BR4 Bart's 105. 2800fps.
Very accurate load. May be better velocity with different primers.

 

[Rope2horns]

Brux 28" 1-8
Varget 30.2gr
CCI450
105 hybrid
2860

 

[Texas10]

X-caliber 28" 1-8
Varget 30.2 gr
105 Berger Hybrid jumping .010
CCI-450
2858, SD 3, ES 8

 

[mikeeg02]

29 or 30" factory 6br savage barrel. 30.5gr varget, 205gm, 2930-2940. Drop chart always said that fps, but I finally chrony'd it and it agrees.

 

[cmillard]

27.25" Krieger .236 bore 5R 8" twist. 105 hybrids jammed .015 ITL, wolf srm, lapua brass, imr 4320. 2906 fps

 

[M.Stilley]

Dang, I need to do more testing....

30.3 R15, CCI 450, and a Berger HVLD is only getting me 2780fps out of a 27" barrel.

I had suspected this was slower than average.

 

[Flouncer]

2750 with factory Lapua and 27-inch PacNor 1/8.

 

[BenPerfected]

Hawk Hill 25" 8 twist 30.2gr. Varget CCI BR4 Bart's 105. 2800fps.
Very accurate load. May be better velocity with different primers.

....or borrow another chronograph

 

[Steelnecktie]

....or borrow another chronograph

I use labradar, don't think it gets any more accurate

 

[Eagle1899]

I have used a Labradar. I was really excited to try it out but found it to be more difficult overall to use than a Magneto Speed. They performed equally.

 

[MrBottleneck]

My initial shooting of my 6br during break in with a 28" 8 twist CBI with 29gr Varget-cci400-105 Brgr target Vld-jump .010
Only shot cci400 as thats what I had on hand. Just picked up some 450s