6mmbr advice

[stephentri]

Hi looking for some advice for loading for 6mmbr norma I'm looking to shoot 108g Eldm,

What length should I get rifle throated for i was thinking 2.400 oal touching lands

Reamer will be .272 neck

What powder I have N150 and N140

Primers CCI BR4

Lapua brass

Thanks and information appreciated

 

[Border]

Lots of information on 6mmBR.com.
which riflesmith are you using? They should be able to advise.

 

[Klenchblaize]

Donkey Basher (Donkey Basher) might be your man.

K

 

[stephentri]

Anyone load for a 6mmbr Any information would be grateful

 

[nowler]

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All the information you will ever need

 

[stephentri]

Still looking for information on 6mmbr and in particular loading for 108g Eldm
Thanks

 

[Woodlander]

I shoot 105 Amax and Scenar with 29.3gr of N150 COAL 2.305 Fed 205M primers, for around 2875 fps for Amax.
Don’t think you can go wrong with either N140 or 150.

 

[GGG]

I use N140 in my stalking rifle with a 103g ELD-X. Super accurate and more than does the job.

The best powder? I’ve never had anything shoot as well as Varget, but try and find it now.

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

 

[nowler]

Still looking for information on 6mmbr and in particular loading for 108g Eldm
Thanks

Every barrel is different. Work up a load and see how you get on.

 

[stephentri]

I know when it comes to load development every barrel is different,
What I am looking to know is oal and length to ogive for a 108g eldm, this is for cutting the throat length, if any of you shoot 6mmbr could you please measure,
Thanks

 

[308tikka]

108 shoudlnt require a different throat to 105 amax/eld or for scenars. If on a magazine fed rifle (and the long heavy bullets can be a pain to feed in 6br) you need the magazine COL to fit.

Ihave taken my 6br off and will keep for future use, going to 6xc.

iirc 29.4 n140 was a good target load for 300m, in a 30” barrel, but for stalking with a 20-24” barrel youll want less.

Vihtavuori app has all the data you need to start, use 105 scenar as starting point.

 

[provarmint]

I had a 6br a few years back, shot 105's very well with N140, better than Varget, freebore I think was.104, bto vaguely remember around 1.765 to the lands with 105 amax.

 

[Ronin]

Just make sure the action uou are using had a small diameter firing pin

 

[Edinburgh Rifles]

surely whoever is chambering it is the person to ask about the throat
if you want to run a specific bullet that may involve a different throat then you bring that up in the chambering discussion

However a no turn neck and a standard CIP throat will accommodate a 108 just fine

in this market I would chose a powder you can reliably replace
30gr of N140 behind the 105 AMax was perfect in my last one

RS50/53
N140 or similar will work just fine

 

[nowler]

I know when it comes to load development every barrel is different,
What I am looking to know is oal and length to ogive for a 108g eldm, this is for cutting the throat length, if any of you shoot 6mmbr could you please measure,
Thanks

I think you’re over thinking this. Seat your bullet of choice to the place where you want it in the case neck and give this to whoever is building your rifle. They can then throat out the chamber if their reamer is short on freebore for what you wish.

These are discussions you should be having with your rifle builder. Freebore lengths will vary depending upon land diameter and lead angle so the numbers someone else gives you will not match exactly.

6br isn’t a throat burner. I wouldn’t stress the freebore number. As long as the reamer is setup for 105/107 class bullets, you’ll be in the ball park.

 

[Ronin]

As others have said - this should be a discussion with your rifle builder

But , most standard throater reamers will accommodate up to 110 class bullets to seat in the case without impinging on powder space

Things also to consider and I can’t stress this enough with the fiddly fecker the BR case is

Action choice (needs to feed and needs to eject the case without half letting go with a reverse case in the action)

Bolt / firing pin - BR is SRP the firing pin needs to be .062” to avoid issues with pressure, primer piercing etc

Magazine feed - will the action feed from magazine

 

[shooter123]

I use N150 with a Berger 105 with great results, so imagine that it'll work well with a 108 too.

 

[Border]

As others have said - this should be a discussion with your rifle builder

But , most standard throater reamers will accommodate up to 110 class bullets to seat in the case without impinging on powder space

Things also to consider and I can’t stress this enough with the fiddly fecker the BR case is

Action choice (needs to feed and needs to eject the case without half letting go with a reverse case in the action)

Bolt / firing pin - BR is SRP the firing pin needs to be .062” to avoid issues with pressure, primer piercing etc

Magazine feed - will the action feed from magazine

My M591 feeds fine. The donor was a 22-250 Rem. Standard floorplate magazine. No firing pin issues either.

 

[Ronin]

My M591 feeds fine. The donor was a 22-250 Rem. Standard floorplate magazine. No firing pin issues either.

That’s fabulous

It’s a lottery as to what feeds and what doesn’t show pressure

 

[scotch_egg]

I’m pretty sure they tikka T3 perform well with 6mmbr.

My old R93 fed perfectly from the .243 mag under but wouldn’t feed in the 22-250 mag insert.

The 6mmbr has been my favourite round to date and by far the easiest to shoot well.