6BR Pet load? (105 hybrid, cci 450, varget, Lapua brass)

[Winny94]

I picked up BR barrel that was only supposed to have 400 rounds through it, but I could not get 109 Bergers to group with a darn. good chance my twist wasn't fast enough, (but not slow enough to account for as bad of accuracy as I was getting I would've thought).

I've read a few times there are known 6BR loads that shoot well (not necessarily optimal) in most 6BRs, but I cannot find them now. Given the component shortage, I'm looking to shortcut my load development a bit.

Anyone care to share a pet load using Lapua brass, 105 hybrids, cci 450 and varget that I can workup to?

 

[BoilerUP]

30.0gr Varget, tweaking 0.4gr either way.

 

[47guy]

30g of varget and run a seating test.

 

[One1Bravo]

30.4gr Varget under a 105gr hybrid 1.79 CBTO. I use BR4 primers though.

 

[Krob95]

30 gr varget, 105 hybrids 10k off had me consistently 0.3-0.5” groups no matter what. I used BR4’s and Fed 205m’s however. SD’s of 2 and ES’s of 5-7.

 

[smoothy8500]

I've read a few times there are known 6BR loads that shoot well (not necessarily optimal) in most 6BRs, but I cannot find them now.

The home of all things relevant in 6mmBR accuracy:

6mmBR Cartridge Guide

Complete Guide for 6mm BR Benchrest precision 6BR rifle shooting, complete with 6BR FAQ, Reloading Data, Loads, cartridge guide, Lapua Brass, Berger Bullets, Sierra reloading, Varmint hunting, competition accuracy training. 6mmBR.com accuracy info. Equipment reviews (.243 bullets, 30BR...

www.6mmbr.com

 

[Winny94]

30.4gr Varget under a 105gr hybrid 1.79 CBTO. I use BR4 primers though.

Do you know what jump that cbto measure coorlates to?

 

[One1Bravo]

Do you know what jump that cbto measure coorlates to?

Should be right around .020 for me.

 

[lte82]

What twist rate?

 

[blbennett1288]

30.4gr Varget, CCI Br4, Berger 105gr Hybrid, 1.645” CBTO

 

[Winny94]

What twist rate?

1-8"

 

[Winny94]

30.4gr Varget, CCI Br4, Berger 105gr Hybrid, 1.645” CBTO

Do you know what that jump that is? Seems jump numbers are all over - not sure if that's because the hybrid has that much range, or if that's the main variable to focus on.

 

[BoilerUP]

Is there a "standard" 6BR Norma freebore? Seems .104-.105 is common, but with plenty of outliers.

 

[blbennett1288]

Yeah mine is .124” freebore

 

[Joel Danielson]

There are too many variables in barrels, chambers, twist rates, freebore, throats, etc...to use any of our exact load data. The standard 30 grains of Varget with 105 hybrids and a quality primer will work in any 6BR I have shot. Use 30 grains of Varget and seat bullets .0005 off, .0010 off etc...out to .0030 off the lands. Somewhere in there, the group will shrink to a onehole/cloverleaf size. Now you can tweek the powder charge on either side to get that perfect load for your rifle.

I have reamers with 104 FB and 125FB in 6BR. Both are used depending on the bullet I want to shoot. The 104 FB is used most often for the 105 class of bullets.
Check out Alex Wheeler's video on how to find your lands for seating depth.

 

[Winny94]

There are too many variables in barrels, chambers, twist rates, freebore, throats, etc...to use any of our exact load data. The standard 30 grains of Varget with 105 hybrids and a quality primer will work in any 6BR I have shot. Use 30 grains of Varget and seat bullets .0005 off, .0010 off etc...out to .0030 off the lands. Somewhere in there, the group will shrink to a onehole/cloverleaf size. Now you can tweek the powder charge on either side to get that perfect load for your rifle.

I have reamers with 104 FB and 125FB in 6BR. Both are used depending on the bullet I want to shoot. The 104 FB is used most often for the 105 class of bullets.
Check out Alex Wheeler's video on how to find your lands for seating depth.

Yea, im not looking for exact loads just a more specific range, which everyone has helped in identifying (~30.0gr +/- .4). Now im just polling to see if theres a good range of seating depth to try and shave off a few shots of development (tough time and all).

FWIW, there are many ways to skin the "find your lands" cat, but Im a big fan of Mark Gordon's:

 

[spife7980]

.020 off of touching the lands is generally going to be a pretty safe guess. Its where I always start and I rarely have to adjust too much from there.

 

[Dthomas3523]

You can make any powder charge group well with seating depth. 1:8 is fine.

Something is wrong (shooter or barrel, etc) if you can’t get them to shoot.

Have never seen a 6br that wouldn’t shoot with 30.0 varget and .020 or so off lands.