Specs for 6mm BR Ackley Imp

[jamesdmock]

I have shot a Dasher for several years and have had some measure of success with it. I now have two Dasher barrels that may have a little life left, but I believe that they may be losing some of their competitive edge. Lately, I have read about the 6mm BRA (Ackley 40*), and am curious. If I set back my longest Dasher barrel (or cut off the tenon & re-chambered), would a 26.5 inch length be sufficient for this new cartridge. Also, I prefer a neck diameter of .269 for my Dashers and about .104 for free bore.

Any one care to comment on my new idea? Thanks, James Mock

 

[johara1]

James, I have a 8 twist 26" I get 2974 from Barts 103 from the imp. with a .125 free bore and an other barrel that does 3250+ with the 80 bt in a 12 twist with a .060 free bore it is a .268 neck. Jim

 

[jamesdmock]

James, I have a 8 twist 26" I get 2974 from Barts 103 from the imp. with a .125 free bore and an other barrel that does 3250+ with the 80 bt in a 12 twist with a .060 free bore it is a .268 neck. Jim

Thanks Jim. I talked to Bart and he said that he was impressed with the 6BRA using a no-turn neck. I prefer turned necks, but will listen to others with more experience. What reamer are you using for this chambering? Thanks again. James

 

[Rope2horns]

Tagged..

I'm interested in the 6BRAI as well....in for a good reamer print.

 

[22DASHER]

All the info you need is right here.

http://forum.accurateshooter.com/threads/thoughts-on-6br-ai-reamer-dimensions.3916724/

I just updated that thread with my reamer print.

 

[Alex Wheeler]

If you order from JGS they will give you my body specs. Throat and freebore is up to you. Use your current dasher seater and get a D2.5 or D3 from Harrells with .080 cut off, they will do it for you. I have chambered a pile of these lately and the feedback have been 100% positive. My reamer is a .268. If you go with the same or larger neck diam as what is in you dasher barrel, the chamber with clean up if you set it back 2 turns.
Even @tom is dasher-less LOL.

 

[X-Caveman]

Is this the one also known as the "6 Honey Badger"???

 

[johara1]

Thanks Jim. I talked to Bart and he said that he was impressed with the 6BRA using a no-turn neck. I prefer turned necks, but will listen to others with more experience. What reamer are you using for this chambering? Thanks again. James

James, I have two the first was made from a new unused Dasher reamer from JGS. A .266 neck because that is what the reamer was, .125 free bore and .2435 free bore diameter .460 shoulder .4708 at the .200 line and 1.560 long chamber The second one is a .268 neck and .060 free bore and .2438 free bore diameter the rest is the same and both use a Harrell's D3 Dasher die cut off about .080 ....... Jim

 

[ngb1787]

If you order from JGS they will give you my body specs. Throat and freebore is up to you. Use your current dasher seater and get a D2.5 or D3 from Harrells with .080 cut off, they will do it for you. I have chambered a pile of these lately and the feedback have been 100% positive. My reamer is a .268. If you go with the same or larger neck diam as what is in you dasher barrel, the chamber with clean up if you set it back 2 turns.
Even @tom is dasher-less LOL.

Alex are u using a .236 or .237 bore diameter on these?

 

[johnnyi]

If you order from JGS they will give you my body specs. Throat and freebore is up to you. Use your current dasher seater and get a D2.5 or D3 from Harrells with .080 cut off, they will do it for you. I have chambered a pile of these lately and the feedback have been 100% positive. My reamer is a .268. If you go with the same or larger neck diam as what is in you dasher barrel, the chamber with clean up if you set it back 2 turns.
Even @tom is dasher-less LOL.

Perfect...! This is exactly what I was looking for to get correct reamer spec'd to do this simple order shortened die. I hope you won't mind if I order same body specs for myself..?

 

[Alex Wheeler]

Alex are u using a .236 or .237 bore diameter on these?

The reamer doesnt know the difference. Use what ever barrel you prefer.