Which 6mm?

[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.

 

[Wyo_hntr]

For those using the 6mm GT, and a tikka, did you get your firing pin bushed and turned down?

Considering going to a GT with hornady making it a distribution wide cartridge.

 

[Lawnboi]

For those using the 6mm GT, and a tikka, did you get your firing pin bushed and turned down?

Considering going to a GT with hornady making it a distribution wide cartridge.

Small rifle primers are a non issue in tikka standard face bolts. I’m barrels into SRP creedmoor brass without issue.