6mm BR

[BuLLet]

Here some results from my second outing with the GAP 6mm BR, was a bit warmer out. Tried a different target too. Think I'll up the charge weight and do some load testing.

Maybe it's time to get some needed cataract surgery too! Old eyes are straining some.

 

[TDWilson]

i’m loading to 30gr for the comp this weekend. That will put the barrel’s round count at > 180.
My plan:
-shoot the comp and get my ass kicked
-clean the rilfe
-retest 29.4 to 30.4 in 0.2gr increments (10 rounds each)
-post results

I threatened back in Feb I would do some testing and post some results at a later time. Well,… here we go.
This is where we were after the first 80 rounds:

Lapua, CCI450, Varget, Berger Hybrid 105

29.4gr = avg 2728, sd 5, es 13
29.6 = 2749, 4, 10
29.8 = 2781, 11, 31
30 = 2806, 6.7, 15
30.2 = 2814, 12, 31
30.4 = 2848, 8, 19

The rifle now has 3 one-day club matches and about 500 rounds now. It has changed quite a bit since the original post in Feb.

Components unchanged as above, I was loading 30gr. A typical 10 shot string would yield the following results:
mean 2890
SD 10
ES 30

I went back to the range with some reduced loads and obtained the following data:

On the target, there was vertical stringing with the 29 and 28.5gr loads, while the 29.5gr load looked pretty good. I can only resolve 5 of the 10 shots on the target, so that’s the best I can do with the target analysis. The other 5 shots are in there somewhere! I’m nowhere near as good a shot as some of you guys are, but I think I can improve on my results at competitions with this load.

So, I’ll probably stick with 29.5gr unless something changes over the next 2,000 rounds!

 

[ReloaderJosh]

How are you liking the Apex Rival?

 

[TexasHaag]

Just purchased a Savage model 12 F Class in 6mm BR Norma 30" barrel 1-8 twist. Anyone ever used the Hornady 110gr A-tips? I'm shooting 600-800 yds.
do I still zero at 100 yds. or is 200 better?

can anyone tell me what the scope mount pattern is for this model? short action? does it need a pic rail to mount on? or can you direct mount the rings without a rail? The scope has a 34mm tube what rings are recommended? Can anyone tell me the pattern and screw size?

I intend to get lighter projectiles Hornady 108 ELD-M. opinions?

Thanks
texashaag

 

[Tokay444]

8 twist might be too slow for 110s, and 108s. It’s marginal for 105s.

 

[4O6shootist]

8 twist might be too slow for 110s, and 108s. It’s marginal for 105s.

8tw at 2950 in my short barrel 6cm does just fine with 109s, 108s, 115s, but I haven't tried the atip. Although that 109 eldm is dimensionally similar cept the tip, I'm 3k elevation and typically 4k or higher DA.

@TexasHaag what DA you typically shoot at? That'd be my determining factor.

 

[Tokay444]

8tw at 2950 in my short barrel 6cm does just fine with 109s, 108s, 115s, but I haven't tried the atip. Although that 109 eldm is dimensionally similar cept the tip, I'm 3k elevation and typically 4k or higher DA.

@TexasHaag what DA you typically shoot at? That'd be my determining factor.

We’re in a 6BR thread. No one is getting a 110 to 2950.

 

[TexasHaag]

8tw at 2950 in my short barrel 6cm does just fine with 109s, 108s, 115s, but I haven't tried the atip. Although that 109 eldm is dimensionally similar cept the tip, I'm 3k elevation and typically 4k or higher DA.

@TexasHaag what DA you typically shoot at? That'd be my determining factor.

DA? I'm not that savy...

 

[ballisticdaddy]

Just purchased a Savage model 12 F Class in 6mm BR Norma 30" barrel 1-8 twist. Anyone ever used the Hornady 110gr A-tips? I'm shooting 600-800 yds.
do I still zero at 100 yds. or is 200 better?

can anyone tell me what the scope mount pattern is for this model? short action? does it need a pic rail to mount on? or can you direct mount the rings without a rail? The scope has a 34mm tube what rings are recommended? Can anyone tell me the pattern and screw size?

I intend to get lighter projectiles Hornady 108 ELD-M. opinions?

Thanks
texashaag

This rifle is an entry level f-class rifle and most of these like the 105-108 weight range offerings and yes it will be stable in 8 twist barrel.
You should be looking for a 20 MOA scope base (picatinny rail) fitting a Savage model 12 or direct mount rings but rail would be better.
Any 34 mm scope rings for picatinny rail will be fine and would recommend at least 1.25" height. 100 yard zero is what most are using.

 

[TexasHaag]

This rifle is an entry level f-class rifle and most of these like the 105-108 weight range offerings and yes it will be stable in 8 twist barrel.
You should be looking for a 20 MOA scope base (picatinny rail) fitting a Savage model 12 or direct mount rings but rail would be better.
Any 34 mm scope rings for picatinny rail will be fine and would recommend at least 1.25" height. 100 yard zero is what most are using.

Thanks just the kind of info I was hoping for....

 

[padom]

Just purchased a Savage model 12 F Class in 6mm BR Norma 30" barrel 1-8 twist. Anyone ever used the Hornady 110gr A-tips? I'm shooting 600-800 yds.
do I still zero at 100 yds. or is 200 better?

can anyone tell me what the scope mount pattern is for this model? short action? does it need a pic rail to mount on? or can you direct mount the rings without a rail? The scope has a 34mm tube what rings are recommended? Can anyone tell me the pattern and screw size?

I intend to get lighter projectiles Hornady 108 ELD-M. opinions?

Thanks
texashaag

No but the 106 A-Tips shooting LIGHTS OUT in my 28" 7.5 twist Bartlein 6BR. Consistently 5 shot groups @ 100yd in the 0.1's and crazy consistently small groups out to 800yds (farthest Ive tested them). 2866 SD 4 across 30rds. 4.3 Mils to 700yd and 3.3Mils @ 600yd and shots stack right on top each other.









600yd - Two different 3 shot groups








30.2gr Varget, 0.01" off lands, CCI450, 2xLapua

15 shots, 3 x 5 shot groups at 100yds

 

[4O6shootist]

We’re in a 6BR thread. No one is getting a 110 to 2950.

I can easily get 109gr Bergers to 2950 from a 28" 6br. Would I run it there all the time? Likely not. Applied ballistics says a 110 atips is stable at 1000' DA from an 8tw at 2780fps. SG needs be 1.4 or higher in my experience for expected bullet performance. I know Berger says 1.5 but I've not seen the difference. I have some rifles that are sg of 1.6, and when it's cold/winter it drops to 1.4X in my climate. The targets look the same at 600-800y other than drop.

 

[Slides]

Based on the velocity I get from a 28 inch 6br with 110atip with a barrel that hasn't sped up yet with 30.5gr varget I imagine a 32 inch barrel should be dead on 2950fps or eben a touch faster. I went 28 inch so it could be a general purpose gun but if I was serious about F class mine would have been 32 inch.

 

[delfuego]

the 106 A-Tips shooting LIGHTS OUT in my 28" 7.5 twist Bartlein 6BR.

Are these only available for cool kids right now? I can't seem to find 106's on Team Red's website.

 

[4O6shootist]

Are these only available for cool kids right now? I can't seem to find 106's on Team Red's website.

They were a limited run. Sold by powder valley as seconds last year. I had a few thou but sold them. Keep an eye out for them, they're allegedly a good bullet from multiple sources. G7 in low to mid 280s. I sampled a few hundred, the base to ogive wasn't near as consistent as over the counter atips in the same lot, I also had several that had non uniform distorted jackets.

 

[TheOfficeT-Rex]

I sampled a few hundred, the base to ogive wasn't near as consistent as over the counter atips in the same lot, I also had several that had non uniform distorted jackets.

They weren’t consistent box to box, or within a single box? I measured 30 or so from one of the boxes I got and they were stunningly consistent in measurements.

 

[padom]

They weren’t consistent box to box, or within a single box? I measured 30 or so from one of the boxes I got and they were stunningly consistent in measurements.

Same, the few thousand I got were crazy consistent also base to ogive also. overall length varied slightly and I sorted them. For a test, I actually grabbed some of the shortest OAL and longest OAL and mixed them and loaded them and thats the 3 x 5 s hot groups posted above so OAL seems to not mater at all. But, weight and Base to Ogive was very consistent

 

[TexasHaag]

No but the 106 A-Tips shooting LIGHTS OUT in my 28" 7.5 twist Bartlein 6BR. Consistently 5 shot groups @ 100yd in the 0.1's and crazy consistently small groups out to 800yds (farthest Ive tested them). 2866 SD 4 across 30rds. 4.3 Mils to 700yd and 3.3Mils @ 600yd and shots stack right on top each other.









600yd - Two different 3 shot groups








30.2gr Varget, 0.01" off lands, CCI450, 2xLapua

15 shots, 3 x 5 shot groups at 100yds

I can not find 106gr A-Tips are they Hornady?

 

[padom]

I can not find 106gr A-Tips are they Hornady?

Yes, there is a whole thread on them. They were made for the DOD specifically. A few places had them in stock over the past 6 months or so. They are currently out of stock.

Hornady 106gr A-tip factory seconds

Didn’t notice any like that. Ill have to keep an eye out when loading. I just got 300 more myself. I haven't looked at them yet. I didn't notice any in the first batch I got either.

www.snipershide.com

 

[TexasHaag]

Just purchased a Savage model 12 F Class in 6mm BR Norma 30" barrel 1-8 twist. Anyone ever used the Hornady 110gr A-tips? I'm shooting 600-800 yds.
do I still zero at 100 yds. or is 200 better?

can anyone tell me what the scope mount pattern is for this model? short action? does it need a pic rail to mount on? or can you direct mount the rings without a rail? The scope has a 34mm tube what rings are recommended? Can anyone tell me the pattern and screw size?

I intend to get lighter projectiles Hornady 108 ELD-M. opinions?

Thanks
texashaag

Thanks for everyone's input...

I intend to try the 110 A-Tips in this new rifle, using 24gr Varget, CCI 450 primers.
I also purchased a box of the new Hornady 80gr ELD-VT.
I'm also looking at Berger 105gr Hybrid.... any opinions? they look to be VERY popular for the 6mm BR Norma.
I'm going to use Peterson Brass, I prefer USA made products.
I'll zero at 200yrds.

 

[lash]

Thanks for everyone's input...

I intend to try the 110 A-Tips in this new rifle, using 24gr Varget, CCI 450 primers.
I also purchased a box of the new Hornady 80gr ELD-VT.
I'm also looking at Berger 105gr Hybrid.... any opinions? they look to be VERY popular for the 6mm BR Norma.
I'm going to use Peterson Brass, I prefer USA made products.
I'll zero at 200yrds.

I use 105 Bergers in Peterson brass over 30.2g Varget for 2950. They are money.

 

[TexasHaag]

I use 105 Bergers in Peterson brass over 30.2g Varget for 2950. They are money.

What is your twist and barrel length?

 

[lash]

What is your twist and barrel length?

8 twist, 26” barrel.

 

[padom]

105s hammer. Go back and read this 6BR thread. All of our data, targets, speeds, SD's powders, barrel lengths, twist, etc is all recorded in this thread. Thats what it's here for..

 

[TexasHaag]

8 twist, 26” barrel.

Mine is 1-8 twist also but a 30" barrel. So, I'd back it off to 29.5 and work from there.

 

[4O6shootist]

They weren’t consistent box to box, or within a single box? I measured 30 or so from one of the boxes I got and they were stunningly consistent in measurements.

I had 20 boxes, pulled 20+- from 10 random boxes, measured. My results are in the 106 atip thread. There were two distinct bto groups, with a handful of outliers. They all had same part number on the box. Hard to tell what lots, but these were "seconds" likely just scooped from bags and dropped into boxes, all mixed off the production line I'm thinking.

 

[TexasHaag]

No but the 106 A-Tips shooting LIGHTS OUT in my 28" 7.5 twist Bartlein 6BR. Consistently 5 shot groups @ 100yd in the 0.1's and crazy consistently small groups out to 800yds (farthest Ive tested them). 2866 SD 4 across 30rds. 4.3 Mils to 700yd and 3.3Mils @ 600yd and shots stack right on top each other.









600yd - Two different 3 shot groups








30.2gr Varget, 0.01" off lands, CCI450, 2xLapua

15 shots, 3 x 5 shot groups at 100yds

The 106's are no longer in stock anywhere I could find....

 

[padom]

The 106's are no longer in stock anywhere I could find....

Yep they are out of stock. A lot of us stocked up on thousands of them the last 2 times they were in stock.

 

[TexasHaag]

I and read that the 6mm BR Norma brass has a smaller primer hole... I have also read that the CCI SR Magnum 450 primers are commonly used, is there a need for magnum primers? I also see many shooters using CCI BR4 primers. Which are better? I would thing the BR4 are more consistent than magnum...

texashaag

 

[dubbednate]

I and read that the 6mm BR Norma brass has a smaller primer hole... I have also read that the CCI SR Magnum 450 primers are commonly used, is there a need for magnum primers? I also see many shooters using CCI BR4 primers. Which are better? I would thing the BR4 are more consistent than magnum...

texashaag

I’ve had great experiences with the 450s. My SD over 15 rounds hovers around 4 and my ES is 10-11. I went with them because they were easier to find in stock and I’m going to stick with them.

 

[alcap]

I also used CCI 450's when I shot a BR. The only way to know if anything will do what you want is to test it. But if there is a preponderance of shooters using one specific component over another, there might be a reason for it.

 

[lash]

I and read that the 6mm BR Norma brass has a smaller primer hole... I have also read that the CCI SR Magnum 450 primers are commonly used, is there a need for magnum primers? I also see many shooters using CCI BR4 primers. Which are better? I would thing the BR4 are more consistent than magnum...

texashaag

I’m having great results with federal 205M.

 

[4O6shootist]

Lot of guys using 450s cuz that what they can find. I run 450s in 22br 6br, 22gt 6gt, 22cm, 6cm, 25cm, 6.5cm. Will also be using them in my new 25x47 when it arrives. I've had no issues keeping es in low teens, SD of 4-5, half moa 10-20 shot zero groups, half or better moa at 400y on paper. Hits on steel to 1300y. The only cartridge I've had a tough time getting to shoot was a 25gt I had spun on a 7.5tw brux, and I think it was a poor barrel, as it fought me on 3 bullets and 3 powders. I threw it in the trash, got a new CRB Comp 7.5tw and went 25x47, as the gt case doesn't have enough ass to run 2750-2800 without being near preasure.

 

[TexasHaag]

Well, I got this new rifle out to the range this weekend.... I fired a ladder using the 105 hybrids' from 29gr to 31 @ .3gr. I'm going to stick with 30gr even. At 100yrds I was able to stack then one on top of the other for a .35" group, which I am very happy with. Here are the particulars. It was raining and the targets fell apart or I'd post a pic....
Peterson brass x1
CCI #450 primers
Hodgdon Varget 30gr.
Berger 105 hybrids
2820fps @ 3 meters (Ver. 1 Labradar)
ES 12.3 (10 shot average)
SD 3.45
CBTO 2.740 (15 thousandths of lands)

Savage model 12 F Class
30" barrel 1-8 twist

Thanks for everyone's input and feedback.
texashaag

 

[joecat2024]

8 twist might be too slow for 110s, and 108s. It’s marginal for 105s.

my 8 twist shoots berger 109 hybrids excellent

 

[TexasHaag]

Has anyone ever tried Winchester 760 in their 6mm BR? I've been using Varget like most folks, but it doesn't meter very well, nothing like a ball powder...

 

[Schütze]

Has anyone ever tried Winchester 760 in their 6mm BR? I've been using Varget like most folks, but it doesn't meter very well, nothing like a ball powder...

Well, it depends on what you are metering with

@Mike Casselton uses CFE and is ok with it to my knowledge.

Stabal works as well.

 

[Mike Casselton]

Well, it depends on what you are metering with

@Mike Casselton uses CFE and is ok with it to my knowledge.

Stabal works as well.

Shuss!!!
Now everyone will buy all of it up.


Shouldn't you be busy right now fixing rich people's overpriced, overengineered cars?

 

[Schütze]

Shuss!!!
Now everyone will buy all of it up.


Shouldn't you be busy right now fixing rich people's overpriced, overengineered cars?

Priorities… 6BR and now 7Saum comes first

 

[TexasHaag]

Well, it depends on what you are metering with

@Mike Casselton uses CFE and is ok with it to my knowledge.

Stabal works as well.

I meter with an RCBS Chargemaster...
So,.... Staball 6.5 works well in the 6mm BR Norma? what is your charge and velocity?

 

[Schütze]

I meter with an RCBS Chargemaster...
So,.... Staball 6.5 works well in the 6mm BR Norma? what is your charge and velocity?

At work, I have to take a look at my data at home. Tried it a couple of years ago when Varget wasn’t available.
Will try n150 next, but it’s not a ball powder.

Also have in mind that I’m shooting steel with mb’s, not competition or bench rest.

 

[Mike Casselton]

My two faster twist (7.5 and 8tw) BRs liked 35.1gr with 105 class bullets.
Velocity was right at 2825 so I never pressed for higher charge weights. No reason to.


You'll want to make sure you clean right away after shooting, or you'll get a pretty nasty carbon ring.



Ball powders burn cleaner with maximum charges, but I never tried to find that with Staball and the BR.


Disclaimer: start much lower and work your way up. There is no published data for the 6-BR and Staball combo. You're on your own here.

 

[XP1K]

Has anyone ever tried leverevolution in their 6br ? I've seen it used to make good velocity in the 6arc with shorter barrels.
I'd like to hit 2800 in a 20" barrel. If a 6arc can do it a br should be able to as well.

 

[Niles Coyote]

First 35 through a new barrel. Joining the 6BR club. All Horny Hybrid's (Aeromatch) seated .057" off in new Lapua brass and Federal standard primers.

Nice to see I have a cartridge that might like staball match. Unlike all my other calibers I've tried it in I had zero hang fires with this combo and it seems to want to group too!

 

[jpistolero02]

Good looking groups! It's such a great little cartridge to load for.