6.5x47 Performance in LOOONG Barrels

[shoot4fun]

Considering a 6.5x47 for a 1000 yard BR rig and was wondering if there is a point where the barrel can be just too long. Is 28" going to be better than 31"? I know twist rate and powder selection mean something so let's say 8.5 twist for that. Also, powders on hand H4350, IMR4451, RL16, RL17, 2000MR and Varget.
Do you have a 6.5x47 set up for LR BR? I want some first-hand experience; the voice of reason if possible. Maybe I should just chamber a 31", test it and cut off a little bit at the time to see?
Drag out those Quickload programs or pull up some OBT.

 

[mikegaiz]

30 in barrel.
http://bulletin.accurateshooter.com/2016/08/amazing-2-856-10-shot-group-at-1000-yards/

 

[skiutah02]

30 in barrel.
http://bulletin.accurateshooter.com/2016/08/amazing-2-856-10-shot-group-at-1000-yards/

That's the way to answer. Bam. Drew

 

[shoot4fun]

30 in barrel.
http://bulletin.accurateshooter.com/2016/08/amazing-2-856-10-shot-group-at-1000-yards/

You know if was just someone talking about it and using that article to support the claim I would likely call BS.
BUT since you're "THE MAN" I will say well done and that I know you have shot yours enough to know what to do.
Kinda puts my 1.864"/49 point five-shot to shame.
Thanks Mike!

 

[Cool Tool]

30 in barrel.
http://bulletin.accurateshooter.com/2016/08/amazing-2-856-10-shot-group-at-1000-yards/

How many of those really good bullets do you have left.

 

[223762]

I'm getting 2850 out of a 32 inch barrel. 140 grn Berger hybrid and 41.1 grn of h4350.

 

[mikegaiz]

50 good ones left

 

[FatBoy]

It's going to be barrel dependant. I have an 28" 8.5 twist Border 5R that I run at 2770fps, mostly due to the sloppy firing pin. I run 41.3gr H4350.

My Kreiger 26" 8 twist 4 groove gets 2835 with 42gr H4350 and 142SMKs with room to go if I wanted. Tempest action with small pin.

 

[Cool Tool]

50 good ones left

Damn G you are going to have to find some more.