Which 6mm?

[108ELDM]

Are you reloading? I find I am looking at more factory ammo than ever before these days.

I do reload. One day I want to buy more factory ammo, but currently I need the cost savings that reloading gives me.

 

[pathnz]

I have a 6mm GT with an 18 inch barrel. With 150 rounds on it I am getting 2800fps with a 108ELDM and a Hodgdon book max load of H4350. Precision is excellent, recoil is mild from an 8lb total setup, and I have killed 6 deer from 90-490 metres satisfactorily in the 3 weeks since I got it.

 

[kkp005]

I really like the 6CM. That’s what I’d go with. Been shooting one almost exclusively the last few years and it continues to impress

 

[mtnbound]

It would be at least 18” if not shorter.

I have also contemplated the 6 Dasher, but I had a couple reservations.

It seems really close to my 6 ARC.
I can’t find much about the 6 Dasher feeding reliably from factory Tikka mags.

With the short barrel I would say 6CM. But with Hornady offering 6GT at all dealers next year with the 109 ELDM, it’s hard not to go that route. I think it comes down to, is this your primary rifle or do you have a training rifle and how far you want to effectively kill an animal. Given the choice I would take the 6ARC in a gas gun and a 6CM in a bolt.

 

[turbo406]

Curious on the dasher as well mostly due to varget being the choice powder, I have noticed the recoil impulse on my 6 arc using varget is way more pleasent than cfe or lever so the dasher having a little more capacity and that same recoil impulse with a temp stable powder I use in everything else really sounds nice.

 

[HandgunHTR]

Well, nobody has recommended it yet, so I will.

I would build a 6BR or 6BRA. While the GT is the cool kid on the block right now, the 6BR has been going strong for a long time. Very easy to load for, will work just fine out of factory mags and super easy on barrels. You do lose a couple hundred FPS over the Dasher or GT, but I am not one to hotrod, so it isn't that important to me. With a 108 ELDM it will still have sufficient velocity at 600 yards to perform.

 

[AZ_Hunter]

Well, nobody has recommended it yet, so I will.

I would build a 6BR or 6BRA. While the GT is the cool kid on the block right now, the 6BR has been going strong for a long time. Very easy to load for, will work just fine out of factory mags and super easy on barrels. You do lose a couple hundred FPS over the Dasher or GT, but I am not one to hotrod, so it isn't that important to me. With a 108 ELDM it will still have sufficient velocity at 600 yards to perform.

I don’t shoot the BR any of these cartridges (yet) so this is a legitimate question:

When you say the BR will work fine with factory mags, are you referring to BR specific mags? Which ones work for you?

 

[Lawnboi]

I’m not sure a br will get there in 18”.

My plan is a 20” dasher. For barrel life and a bullet starting at 2750 hopefully. 103eldx and 80eldvt should do it well.

 

[108ELDM]

I really do like the idea of a Dasher as well. My 6 ARC is getting 2560 from a 20" Barrel. That still gets me close to 600 yards. I have thought in the past about getting the Atlasworxs CTR to AICS conversion and running a dasher. I do like the idea of having one gun that I can practice extensively with as well as hunt.

 

[HandgunHTR]

I don’t shoot the BR any of these cartridges (yet) so this is a legitimate question:

When you say the BR will work fine with factory mags, are you referring to BR specific mags? Which ones work for you?

I was specifically talking about the standard Tikka mags and Remington BLD mag setups. There is some room in them, but they feed just fine. BR specific AICS mags are just .308 mags with a spacer.

 

[wyosam]

It would be at least 18” if not shorter.

I have also contemplated the 6 Dasher, but I had a couple reservations.

It seems really close to my 6 ARC.
I can’t find much about the 6 Dasher feeding reliably from factory Tikka mags.

Dasher feeds perfectly from tikka mags.


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[108ELDM]

Dasher feeds perfectly from tikka mags.


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Do you have any Dasher Data you could share. I am curious what kind of velocity guys are getting out of hunting length barrels. If I remember right, Hodgdons data is a 30" barrel.

 

[Shooter264]

21” 6 dasher Lapua brass 105 hybrid N540. 7.5lb hunting weight rifle

 

[Lawnboi]

I really do like the idea of a Dasher as well. My 6 ARC is getting 2560 from a 20" Barrel. That still gets me close to 600 yards. I have thought in the past about getting the Atlasworxs CTR to AICS conversion and running a dasher. I do like the idea of having one gun that I can practice extensively with as well as hunt.

Waters rifleman makes mags for the tikka at dasher/br length. I plan to also try and make factory mags work as well but the WR mag is already in hand for a standby.

Alternatively there are aics mags, along with Hawkins hunter mags with their spacer for dasher/br.

I see no reason I can’t make the tikka mags work just fine. I’m already feeding 2.6” 22 creed just fine so I doubt dasher will be an issue in a single stack tikka mag. So long as your setup dosnt have a lot of slop.


But yea, it’s an interesting option I’m excited to try. 2-3k round barrel life. Ability to load 80g for varmints and predators. Low recoil. SRP and tiny powder charges. Alpha brass availability.

I have a couple blanks for my match gun getting chambered for alpha dasher, if all goes well I’ll have 3 barrels ready by spring and make loading easy.

 

[108ELDM]

21” 6 dasher Lapua brass 105 hybrid N540. 7.5lb hunting weight rifle View attachment 778377View attachment 778378

That is a lot faster then I expected from a 21" barrel. Now I have even more to contemplate.

 

[wind gypsy]

That is a lot faster then I expected from a 21" barrel. Now I have even more to contemplate.

N540 likely has something to do with that.

 

[Castle Rock]

The Gay Tiger seems to be the sweet spot

 

[Shooter264]

N540 likely has something to do with that.

Was 2840 with Varget. N540 shot better for me.

 

[eoperator]

My plan is a 20” dasher. For barrel life and a bullet starting at 2750 hopefully. 103eldx and 80eldvt should do it well.

21" #5 brux origin 6dasher

With varget i am at 2750fps with 103eldx and 3100fps with eldvt.

To the op I put this rifle together with similar thoughts as you but to be honest I always grab the 6cm for hunting. You have a 6arc the ultimate target/close range hunting cartridge, seems a hot rod cartridge would compliment the 6arc nicely for hunting.

 

[khuber84]

In an 18" barrel the 6cm still gets surprisingly good velocity. I just tested 105hyb and 112mb in my 18in yesterday. Was able to get up to 3000fps with both, H4350 w/ 105s and rl26 with 112s. No bolt lift or ejector marks either. Case web diameters on lapua brass tell me its pretty dang warm, as they're only .0006 under chamber diameter. Going to run the 2900 node with 112s as it likely has a lower velocity threshold for expansion and has same wind holds as the 105 at 3k. It's a lot lower pressure as well. I've shot a lot of 6gt, several barrels worth. It does just fine with 24-28" barrels, but an 18" is gonna take a lot of it's steam, beings it holds 8gr less than the creed. The 6cm at pressure from a 26" is 200fps faster than the 6gt w/ H4350 when I compared a few last year. In 18" I think it'll still be 150fps faster just do to the efficiency of the smaller case. 6gt id go no less than 20" as I think you could still run the mid 2800 velocity window without being too close to pressure. I have a 21" gt being cut for my Tikka now.