6BR- Ackley Improved 40 degree

[Alex Wheeler]

 

[birdog]

Would someone please post a pic of the case beside a Dasher case??
Thanks

 

[thekriebles]

Would someone please post a pic of the case beside a Dasher case??
Thanks

Here are several comps:

 

[SHall]

Same here Tom, I appreciate you, Jim and others for giving it a try! Myself and a couple of other fellows here in NC have had good luck with it. One friend got SOY at Hawks Ridge last year shooting 1000 yard. I got 1st or second place at 600 yards at Piedmont the few times I got to shoot last year. My AI is the most consistently accurate rifle I have shot here at my range at home at 500 yards. It shot 3 consecutive .8 inch groups with three different powder charges one day. The smallest group I have shot there before with Dashers was a .9. I have been battling colon cancer for the past year and have not got to do nearly as much shooting as I usually do. I am slowly getting back into it. I am cancer free now. But the surgeon says it will take me another year to recover from the 2 surgeries, 4 chemos and radiation. I hope you continue to have great success with the AI! I enjoy reading your posts. You sure know what you are doing! Samuel Hall

 

[johara1]

Sam, I sure took the heat on BRC. over the 6Br Imp. but it is the best shooting gun I have and it shot smaller than the PPC. and it agged better than the PPC at 100 ...... They can't accept that, sounds like the guys shooting a .222 when the PPC came on the scene ........ Jim

 

[BoydAllen]

What bullet and throat length?

 

[johara1]

What bullet and throat length?

Boyd, Barts 103 and 105 throat is .125

 

[KenOath]

Same here Tom, I appreciate you, Jim and others for giving it a try! Myself and a couple of other fellows here in NC have had good luck with it. One friend got SOY at Hawks Ridge last year shooting 1000 yard. I got 1st or second place at 600 yards at Piedmont the few times I got to shoot last year. My AI is the most consistently accurate rifle I have shot here at my range at home at 500 yards. It shot 3 consecutive .8 inch groups with three different powder charges one day. The smallest group I have shot there before with Dashers was a .9. I have been battling colon cancer for the past year and have not got to do nearly as much shooting as I usually do. I am slowly getting back into it. I am cancer free now. But the surgeon says it will take me another year to recover from the 2 surgeries, 4 chemos and radiation. I hope you continue to have great success with the AI! I enjoy reading your posts. You sure know what you are doing! Samuel Hall

Hi Samuel,
Am curious to know if you don't mind me asking are you still running with a .272 no turn neck on your BRAI? Do you see any accuracy differences between turned and unturned Lapua brass in 6ai?

Cheers Rushty

 

[SHall]

Rushty,
Yes, I am still running a .272 neck (no turn) in my 6BR-AI. IMHO, I have seen no accuracy difference between turned and unturned brass. I have studied this for years. I have used both. Just look how well Richard Schatz has shot over the years using a no turn Dasher! Several records have been set at 600 yards with different no turn 6BR's. I did an experiment several years back when I was trying out a 6BRX at that time. I had a very good barrel I was testing at 600 yards. I had loaded up its favorite load to shoot one pristine morning just after dawn when there were perfect conditions. The BRX had a no turn .272 neck. I had loaded enough rounds to shoot 4 targets with no turn brass and 4 targets with brass that I had cleaned up the necks. Everything else was the same. I also alternated targets. I would shoot one target with no turn brass, then one target with turned, until I had shot 4, five shot targets with each. I agged both targets. I could not tell any difference between the two sets of targets with the naked eye. I put calipers to both sets and agged them. Both sets of targets agged under 2 inches easily. And after everything was said and done, the no turn brass won by just a few thousands. Close enough I would consider it a tie. I am not trying to say the no turn was more accurate, but it was so close, I concluded the turned brass was no help in accuracy. Lapua 6BR brass is excellent brass. If the necks were of inconsistent thickness, I would say turn it, but it is very, very consistent! That is just my opinion. Samuel

 

[Ggmac]

Rushty,
Yes, I am still running a .272 neck (no turn) in my 6BR-AI. IMHO, I have seen no accuracy difference between turned and unturned brass. I have studied this for years. I have used both. Just look how well Richard Schatz has shot over the years using a no turn Dasher! Several records have been set at 600 yards with different no turn 6BR's. I did an experiment several years back when I was trying out a 6BRX at that time. I had a very good barrel I was testing at 600 yards. I had loaded up its favorite load to shoot one pristine morning just after dawn when there were perfect conditions. The BRX had a no turn .272 neck. I had loaded enough rounds to shoot 4 targets with no turn brass and 4 targets with brass that I had cleaned up the necks. Everything else was the same. I also alternated targets. I would shoot one target with no turn brass, then one target with turned, until I had shot 4, five shot targets with each. I agged both targets. I could not tell any difference between the two sets of targets with the naked eye. I put calipers to both sets and agged them. Both sets of targets agged under 2 inches easily. And after everything was said and done, the no turn brass won by just a few thousands. Close enough I would consider it a tie. I am not trying to say the no turn was more accurate, but it was so close, I concluded the turned brass was no help in accuracy. Lapua 6BR brass is excellent brass. If the necks were of inconsistent thickness, I would say turn it, but it is very, very consistent! That is just my opinion. Samuel

But you were still using a barrel /chamber made for no turn . To properly test the barrel would have to be chambered for the tight neck , shoot your groups , then open the neck for a no turn and test your groups then compare . Just my opinion .

 

[johara1]

Rushty,
Yes, I am still running a .272 neck (no turn) in my 6BR-AI. IMHO, I have seen no accuracy difference between turned and unturned brass. I have studied this for years. I have used both. Just look how well Richard Schatz has shot over the years using a no turn Dasher! Several records have been set at 600 yards with different no turn 6BR's. I did an experiment several years back when I was trying out a 6BRX at that time. I had a very good barrel I was testing at 600 yards. I had loaded up its favorite load to shoot one pristine morning just after dawn when there were perfect conditions. The BRX had a no turn .272 neck. I had loaded enough rounds to shoot 4 targets with no turn brass and 4 targets with brass that I had cleaned up the necks. Everything else was the same. I also alternated targets. I would shoot one target with no turn brass, then one target with turned, until I had shot 4, five shot targets with each. I agged both targets. I could not tell any difference between the two sets of targets with the naked eye. I put calipers to both sets and agged them. Both sets of targets agged under 2 inches easily. And after everything was said and done, the no turn brass won by just a few thousands. Close enough I would consider it a tie. I am not trying to say the no turn was more accurate, but it was so close, I concluded the turned brass was no help in accuracy. Lapua 6BR brass is excellent brass. If the necks were of inconsistent thickness, I would say turn it, but it is very, very consistent! That is just my opinion. Samuel

Sam, the lots of brass I have sure doesn't lend it's self to no-turns, plus seating force is all over the place. I kind of went to a .268 and make one pass to fire form and a second after fire forming to get the lumps out. It sure does shoot small...lol....... Jim

 

[Alex Wheeler]

Rushty,
Yes, I am still running a .272 neck (no turn) in my 6BR-AI. IMHO, I have seen no accuracy difference between turned and unturned brass. I have studied this for years. I have used both. Just look how well Richard Schatz has shot over the years using a no turn Dasher! Several records have been set at 600 yards with different no turn 6BR's. I did an experiment several years back when I was trying out a 6BRX at that time. I had a very good barrel I was testing at 600 yards. I had loaded up its favorite load to shoot one pristine morning just after dawn when there were perfect conditions. The BRX had a no turn .272 neck. I had loaded enough rounds to shoot 4 targets with no turn brass and 4 targets with brass that I had cleaned up the necks. Everything else was the same. I also alternated targets. I would shoot one target with no turn brass, then one target with turned, until I had shot 4, five shot targets with each. I agged both targets. I could not tell any difference between the two sets of targets with the naked eye. I put calipers to both sets and agged them. Both sets of targets agged under 2 inches easily. And after everything was said and done, the no turn brass won by just a few thousands. Close enough I would consider it a tie. I am not trying to say the no turn was more accurate, but it was so close, I concluded the turned brass was no help in accuracy. Lapua 6BR brass is excellent brass. If the necks were of inconsistent thickness, I would say turn it, but it is very, very consistent! That is just my opinion. Samuel

Sam,
Are you running a mandrel in the necks or just using a bushing? Thanks

 

[saunaking]

I did some initial load work this fall with mine before it got too cold to really give me useful info for warm weather shooting. From info gained by another BR shooter that uses this chambering, I started at 31 grains of Varget and got up to 31.6 before finding a one-hole group at 100 yards.


This load was tested at 300 yards, with a 5 shot group under a half inch with excellent vertical. I haven't chronographed it yet, but figure my velocities are around 2900 based on 300 yard come-up. I'm using BR4 primers so far with EPS 107 grain bullets.

Update: Shot a match at 600 yards last Monday using 105 hybrids and 31.7 grains of Varget. A fellow shooter had his lab radar set up, and I was able to get readings on all shots. Average for the 22 shots was 2985 with an ES of 7. Dropped one point due to a let-off that I didn't see.

 

[swd]

It sounds like it could end up being the ultimate mid range F cartridge. I see one in my near future.

 

[rocketron]

Sam, the lots of brass I have sure doesn't lend it's self to no-turns, plus seating force is all over the place. I kind of went to a .268 and make one pass to fire form and a second after fire forming to get the lumps out. It sure does shoot small...lol....... Jim

Jim
What die are you using to size the brass for the second turning?

 

[Willow]

Fireformed 24 pieces of brass today running 30gr of ADI2208 behind 95gr Berger VLDs. Averaged 2930fps out of a 30" Krieger barrel. Barrel now has 100 rounds through it. Dropped 2 shots due to vertical but a Labradar showed 1 shot at 2914fps which put me fractionally low, and 1 shot fractionally high at 2948fps, enough to make a difference at 800. Everything else hovered around the 2930 mark and went into the X ring. Now that my cases are fireformed, I'll run some Berger 105 Hybrids and Nosler RDFs through it to see how it goes. Just a really enjoyable cartridge to play with and so efficient on powder.

 

[johara1]

Jim
What die are you using to size the brass for the second turning?

Die ? I did make a die for thin necks by boring out the body of a Forster FL. Dasher die so I just size down the neck. then I can use the expander to open it back up for the proper clearance ...... Jim

 

[KenOath]

Rushty,
Yes, I am still running a .272 neck (no turn) in my 6BR-AI. IMHO, I have seen no accuracy difference between turned and unturned brass. I have studied this for years. I have used both. Just look how well Richard Schatz has shot over the years using a no turn Dasher! Several records have been set at 600 yards with different no turn 6BR's. I did an experiment several years back when I was trying out a 6BRX at that time. I had a very good barrel I was testing at 600 yards. I had loaded up its favorite load to shoot one pristine morning just after dawn when there were perfect conditions. The BRX had a no turn .272 neck. I had loaded enough rounds to shoot 4 targets with no turn brass and 4 targets with brass that I had cleaned up the necks. Everything else was the same. I also alternated targets. I would shoot one target with no turn brass, then one target with turned, until I had shot 4, five shot targets with each. I agged both targets. I could not tell any difference between the two sets of targets with the naked eye. I put calipers to both sets and agged them. Both sets of targets agged under 2 inches easily. And after everything was said and done, the no turn brass won by just a few thousands. Close enough I would consider it a tie. I am not trying to say the no turn was more accurate, but it was so close, I concluded the turned brass was no help in accuracy. Lapua 6BR brass is excellent brass. If the necks were of inconsistent thickness, I would say turn it, but it is very, very consistent! That is just my opinion. Samuel

Samuel,
Thank you for taking the time to share your hard earned knowledge, I am convinced to now test for myself a no turn neck vs turned neck and see how it goes.. it's very hard to argue with your success and experiences.

Much appreciated

Rushty

 

[KenOath]

I am using my dasher seater.

Tom

Hi Tom,
Are you using a Dasher seater that's been shortened or still original length?
I was planning on using a Wilson Dasher inline seater as is and see how straight they come out!

Cheers Rushty

 

[KenOath]

I'm just using my Wilson dasher seater in unmodified form. Never check for run out with exception of locating my touch number on my dummy round.

Tom

Tom,
Thanks for sharing your info it's much appreciated.

Cheers Rushty