6mm BR

steve123

Lt. Colonel
Belligerents
Mar 16, 2008
8,254
889
219
Flagstaff, AZ
I shot 5 rounds over my friends Labradar on Sunday, 6 fps ES !!

30.3 gr Varget, 105 hybrid, CCI450, powder weighed to the kernel with a Scott Parker tuned M5.

Head shot at 500Y on 2/3 IPSC and no vertical at 795y. Dope was perfect!

Liking my 6mmBR!
 

generalzip

Sergeant
Belligerents
Jun 30, 2010
1,713
448
189
29
Houston, tx
Does anyone else get heavy bolt lifts with even moderate loads? I noticed by BR has a much heavier bolt lift than say my 6 creedmoor etc.
 

Ranger188

Sergeant of the Hide
Belligerents
Minuteman
Dec 13, 2018
299
148
49
Yes, i do also. Never thought about, cause I'm bumping the shoulders back .002
to new Lapua case size. Don't know if it's the brass or just a tight chamber. PVA did mine
Not to worried, shoots fine and no pressure signs.
I FL resize the brass every time. I'm guessing, tight chamber.
 

generalzip

Sergeant
Belligerents
Jun 30, 2010
1,713
448
189
29
Houston, tx
I’m told it has to do with the case web of the BR. Just part of the case design. It’s thinner than other cartridges supposedly?
 

steve123

Lt. Colonel
Belligerents
Mar 16, 2008
8,254
889
219
Flagstaff, AZ
Still impressed with my 6mmBR!!! The accuracy is stupid at times.

Recent report is...On Saturday I shot 2 shots touching at 400Y, went to 500Y same thing but with 3 shots, and 3 impacts well centered with no vertical to speak of at 792Y only 1.5" wide, actually the first 2 shots were touching as well. All on steel painted white. Satisfyingly boring I'll tell yuh ??!! Friends were freaking a little, lol.

To create some sort of challenge I shot off the tripod in sitting position using all holdovers, not quite the small vertical as prone off the bipod but I still hit all 3 steel.

Might as well just practice off obstacles, or for positional, when the wind is down ???
 

Ranger188

Sergeant of the Hide
Belligerents
Minuteman
Dec 13, 2018
299
148
49
This load only works for me and my application.
always workup your load and mine might not work for you.
Current load is holding fine. Lapua brass, CCI450 primers, Sierra 95g smk 31.85g(A&D FX120i scale) IMR4166 @3033fps
Just had to move bullet, .001+ 600 rounds. No pressure signs. Case is plenty full
 

reubenski

First Sergeant
Belligerents
Jun 8, 2008
2,249
1,558
219
39
Colorado Springs, CO
You'll know when you need small base dies. Usually comes with hard extraction from the web not being sized down enough. IE, loose dies/ tight chamber, or from running high pressure loads and blowing out your web.
 

Ranger188

Sergeant of the Hide
Belligerents
Minuteman
Dec 13, 2018
299
148
49
No you don't need a small base die.
I use Forster micro seater and their custom FL sizing die honed out to .267 for Lapua brass
I anneal and FL size every time. That's what works for me.
 
  • Like
Reactions: 47guy and reubenski

usafa77

Full Member
Belligerents
Feb 18, 2017
523
83
34
Thanks all. Ranger188, does that give you .002 tension? You"re my man- I've got a bunch of 4166 to burn.
 

Ranger188

Sergeant of the Hide
Belligerents
Minuteman
Dec 13, 2018
299
148
49
A little less. ( .0015) I know of a few that go .266
The .267 has been working for me, so I see no need to change.
This is with a no turn neck chamber.
 

47guy

Private
Belligerents
Jul 15, 2017
941
431
69
55
reno,nevada
I had to go .265?? For .0025 neck tension. Only. 0005 tension with. 267.
depends if you using an expander or not...a .266 bushing should put you at .002...i use a .266 with a .2405 expander ball that puts my outter neck at .266 and loaded at .268.
 

steve123

Lt. Colonel
Belligerents
Mar 16, 2008
8,254
889
219
Flagstaff, AZ
I don't use a expander, or button, I just use a bushing to neck down.

Could be my .267 bushing was more like 267.5 -.268?? Seems so because I had almost no neck tension.

I was thinking you used a expander like some guys do but after rereading you do use a button. I was busy so I skipped over your post too fast.

Whatever it takes to get at least enough neck tension to hold a bullet without it getting shoved back into the cartridge when cycling the action. I like .002 to .003.