Short Barrel 6 Creedmoor?

[nrspence]

Anybody running a heavy sporter contour (#5 x-caliber, #3 bartlein, etc) barrel in a larger barrel channel? Wondering if it would be an absurdly large gap between the barrel and that large of a channel in a manners stock.

It will looks just fine.

 

[Ktwebb33]

Any of yall running a 16.5”-18” have it in a Bartlein 3/3b/4 or an XCaliber #5/#7, or Benchmark/Brux 4/5/6??

Trying to get an idea on weights on some of these in that range of lengths.

 

[wind gypsy]

If you want lighter Benchmark has more desirable contours than the typical bartlein/brux/krieger/ACE contours. They dont have such heavy shanks and taper down more on the breech end and then the straight taper to the muzzle is less which results in lower weight for a given muzzle diameter.

 

[Ktwebb33]

If you want lighter Benchmark has more desirable contours than the typical bartlein/brux/krieger/ACE contours. They dont have such heavy shanks and taper down more on the breech end and then the straight taper to the muzzle is less which results in lower weight for a given muzzle diameter.

Good to know…I’ll look into that

 

[nrspence]

The bartlein 3B brux #4 is the ideal profile for a short barreled hunting rifle, it is light but not unshootable light. I’ll weigh my 20inch 3B tikka T3x XLR element 4.0 magnesium chassis tomorrow.

 

[Bobrobheimer]

I’ll revive this thread with a question:

I’ve got a 16” 6CM and am starting to hand load for it after initially shooting factory Berger 105 hybrids for the brass. (With those I was getting about 2550fps). For context I am loading 90gr HHT with H4350. Hammer bullets seem to be fine with a significant jump and if I seat the bullet all the way to the coward most drive band it’s about .100” jump which again seems okay. (I hate to seat them with the neck in between the drive bands).

Anyway - accuracy aside from more or less jump - does one think that in a short barrel context it could be advantageous to seat a bullet deeper, there by reducing case capacity and increasing pressure for a lower charge weight as opposed to seating further out to allow for a higher charge weight and similar pressure, which in a longer barrel would generate faster speeds but in a shorter barrel doesn’t have the time to do so? Thoughts?

 

[Tahoe1305]

Old thread but some more data.

18” Proof on a tikka. Throat measured out to be almost exactly to book spec (most my tikkas are longer). Loaded to 2.790” OAL.

Minor pressure at 45g of superformance @ 2930fps. Backed off to 44g @ 2880. Again right at Hornady #s.

Pretty impressed for 18”.

 

[Brandon_SPC]

Was searching for 6 Creed shorty info and came across this thread, thought I’d share my results. Factory Howa barreled action, with Hornady 108 ELD-M box ammo (small sample size of 5 shots)

24” - 2980 fps
16” w/ Ultra 5 - 2630 fps

Dropped a lot more velocity than I expected, but it’s still more than sufficient for the intended purpose

I would be curious to what you could do with reloading. Last week I did a velocity node with my 6mm ARC. It has a 16.5" barrel 1:7 twist and I was getting 2615 fps with 29.6 grains of Staball Match using Alpha Brass and 107 SMKs. It's interesting to see my 6mm ARC modest reloads ( 1.5 grains from Hornady Max, which is 31 grains) at the same as a 6mm CM factory ammo.

 

[Bobrobheimer]

I posted this else where but: 16” 1:7.5 twist with 40gr of H4350 is getting a 108eldm to about 2770 or so and is more than a grain under some book max and where I started to find early pressure signs. I was pleasantly surprised just how much faster this was the than factory 105 Berger was doing.