Short barrel 6CM data

[sierracharlie338]

I am building my wife a 6CM for a hunting rig. She will be shooting factory ammo almost exclusively and I am looking for data on barrel length vs speeds with 105-109 class projectiles.

I’m thinking of running a 20inch barrel because it will be suppressed but don’t want to handicap the cartridge’s performance either. Mostly will be a sub 300yd gun but may get her into the mid range target stuff 5-700 but that would be a secondary function.

Let me know what y’all are seeing with 18-22 inch barrels.

 

[TheOfficeT-Rex]

I have a 22" PVA Osprey on right now. With a can on, it's still possible to run good speeds. Previously, I had 109 bergers at 3044, or 115 DTACs at 2900, both with N160.

I'm running the 109 Bergers at 2840 now. I had a little temperature/pressure building issues taking the 3044 load from 40*F to 95*F.

 

[sierracharlie338]

I have a 22" PVA Osprey on right now. With a can on, it's still possible to run good speeds. Previously, I had 109 bergers at 3044, or 115 DTACs at 2900, both with N160.

I'm running the 109 Bergers at 2840 now. I had a little temperature/pressure building issues taking the 3044 load from 40*F to 95*F.

Good to know thanks!

 

[Todc]

I'm getting 2950 in a 18" brux with 108 eldm. Leaning on Peterson brass with H4350.

 

[Raider4044]

My 18” is slinging 108 ELD-Ms at 3030 fps with H4350, Lapua brass, and CCI 450s.

 

[sierracharlie338]

I'm getting 2950 in a 18" brux with 108 eldm. Leaning on Peterson brass with H4350.

My 18” is slinging 108 ELD-Ms at 3030 fps with H4350, Lapua brass, and CCI 450s.

Thanks guys. What twist are y’all running?

 

[Raider4044]

Thanks guys. What twist are y’all running?

1-7.5”

 

[Todc]

7.5

 

[High Desert duck]

I’m running Hornady 109 eldm and 110 atip at 3035. 22 inch bartlein CF 1:7
It’s below hodgdon’s book max by .4

41.0 H4350
Lapua
CCI 450

 

[sierracharlie338]

I’m running Hornady 109 eldm and 110 atip at 3035. 22 inch bartlein CF 1:7
It’s below hodgdon’s book max by .4

41.0 H4350
Lapua
CCI 450

Good info thanks!

 

[Dogtown]

For comparison, I run a 16" 6mmC using 95 VLDs (because of twist limitation) running at 2800fps. Shorty 6s are very doable.

 

[sierracharlie338]

For comparison, I run a 16" 6mmC using 95 VLDs (because of twist limitation) running at 2800fps. Shorty 6s are very doable.

What twist are you running?

 

[Dogtown]

1:9 - it was all they had at the time.

 

[sierracharlie338]

1:9 - it was all they had at the time.

Got ya