Any testing with the 6BR 40deg shoulder?

[dmoran]

Sam -
Thanks for the great report !.!.!
With those velocities at those charges, it is more efficient then a Dasher.
What is your H2O case capacity?
Thanks... Donovan

 

[SHall]

Donovan, I checked the powder capacity ( not H2O) a while back. Best I remember the AI held about .5-.7 more grains of R-15. I was not really looking for more capacity when I started with this chambering. My match load of R-15 (32.3g), almost completely fills the case without crunching the powder. I believe that is what the PPC guys want, near 100% density in the case. I am thinking the 40 degree shoulder may make a slightly better combusion chamber for a more efficient, consistent burn like you said. Samuel Hall

 

[Jason Boersma]

I just might have to get my own reamer for this, simple and effective.

 

[Phil]

View attachment 976155

Any chance you could pour some powder into the 6br AI and the 6 BRDX and post the powder capacities of both.

Filling to the top will work for me, as it`s only to gather the difference in capacity between the two.


Thx,

Phil.

 

[johara1]

Donovan, I checked the powder capacity ( not H2O) a while back. Best I remember the AI held about .5-.7 more grains of R-15. I was not really looking for more capacity when I started with this chambering. My match load of R-15 (32.3g), almost completely fills the case without crunching the powder. I believe that is what the PPC guys want, near 100% density in the case. I am thinking the 40 degree shoulder may make a slightly better combusion chamber for a more efficient, consistent burn like you said. Samuel Hall

Sam, It seems to get the same velocity as a Dasher with 33.4 gr. of RL- 15 with a .135 FB.

 

[Thumper]

Sam and Tim, could you post reamer prints for us to look at?

 

[tclaunch]

Sam and Tim, could you post reamer prints for us to look at?

 

[johara1]

as compared to a 6br imp. print the shoulder -body is 1.1190 and the shoulder- neck is 1.2346 and the Dasher is … shoulder - body 1.1973 and shoulder- neck 1.3129. Tim your print is almost a Dasher less .012…… jim

 

[tclaunch]

as compared to a 6br imp. print the shoulder -body is 1.1190 and the shoulder- neck is 1.2346 and the Dasher is … shoulder - body 1.1973 and shoulder- neck 1.3129. Tim your print is almost a Dasher less .012…… jim

I am aware of that, but Kiff said with the angle of the shoulder, you gain more than .012" in the neck length. Side by side its right between BRDX and Dasher, and is what I asked for.

 

[stansrifles]

Sorry had to try again

 

[Thumper]

Here is a 6 BR AI print that Samuel Hall sent me to post, he also has a .120 free bore version I will try to post later. Thank you Sam.

 

[Thumper]

Here is the .120 free bore 6 BR AI print that Samuel Hall sent me to post, Thank you Sam.

 

[Rtheurer]

Tag for Latter... Thanks fellas.

Russel

 

[johara1]

Thumper, i think your free bore is .135

 

[stansrifles]

Well here is my 6dasher an 22dasher short I will play with22 dasher short at 600.
Stan

 

[SHall]

Stan, What bullet are you going to shoot at 600 with your 22 Dasher Short? I wish Berger would come out with about a 85g Hybrid to get over a .500 BC. Samuel Hall

 

[stansrifles]

Stan, What bullet are you going to shoot at 600 with your 22 Dasher Short? I wish Berger would come out with about a 85g Hybrid to get over a .500 BC. Samuel Hall

I have not been able to get any feelwhat would be really good looking at 80 grain Berger an jlk swampworks 75 gr a max will run 3300 but I don't think it will do what we try to achieve

Stan, What bullet are you going to shoot at 600 with your 22 Dasher Short? I wish Berger would come out with about a 85g Hybrid to get over a .500 BC. Samuel Hall

 

[johara1]

Stan, What bullet are you going to shoot at 600 with your 22 Dasher Short? I wish Berger would come out with about a 85g Hybrid to get over a .500 BC. Samuel Hall

What about the 90 vld @.534……… jim

 

[stansrifles]

Do you have any Jim I can't seem to find any right now put some on back order.
Stan

 

[Matt P]

What are using for a sizing die ??
Matt P