Looking at moving to a 6 BRA and I’m curious what speed y’all are seeing with a DTAC? Also, if anyone has the numbers how long is the neck? Trying to decide on a freebore for the reamer.
6BRA - 115 DTAC speed / freebore
- Thread starter BLopina
- Start date
cut it out with them DTACs... Save them for your 47.
With 105/107/ 108 grain bullets - a FB of 120-135 is ideal. based on neck shoulder junction and bullet heel.
You are making the right call going BRA vs. Dasher by the way - in reference to your facebook post.
If you want the easy reamer answer - just order the JGS reamer - #1323 w/ 273 neck and whatever FB you decide on. Let me know if you want reamer prints. I have most all of the specs of guys running the bra in our sport vs. more of the BR crowd etc.
The DTACs have been good to a lot of my Dasher buddies and myself.
Just curious why you discourage it...?
Just curious why you discourage it...?
I run the DTAC's in my 47 as well. I've been thinking of giving the BRA a run too. Why not go with the DTAC's in the BRA?
Well; when anybody has anything negative to mention about a product endorsed by one of the greatest shooters of all time (who is also profiting from said product ), most don't hear that person out for what they are saying. So I will keep polite and quiet publicly Lopina. Feel free to DM if you want my experience and thoughts.
I’m open to trying both 105 class and 115s... I just know the 115 has been good to me in the 6x47 and I have a lot of good buddies that are seeing good success in BR variants.
Most likely I’ll try both.
Most likely I’ll try both.
FWIW 31.6 of Varget behind a 105gr bullet eventually gave me pressure signs and was definitely not a rain safe load. I would imagine that with 31.6 and a 115 you are really flirting with pressure.
My 115 DTAC load in a Dasher is 31.4gr Varget at 2810 fps from a 27" barrel.
My 115 DTAC load in a Dasher is 31.4gr Varget at 2810 fps from a 27" barrel.
I’ve been finding the br a pressure margin is pronounced; once I hit that mark, it seems to pressure out quick. I assume likely a function of the fast burning powder bumped even .2 grain increment is a larger percentage of the case.
I found that during early load development in clean and controlled conditions I could run the cases pretty hot without apparent pressure signs. I got up near 3000 fps with a 105, I think into the 2900's with a 110, etc. However those loads loosened primer pockets and over time in field conditions with dirty/wet chamber pressure would show up.
If you told me I had to shoot a match in downpour rain I'd choose somewhere like 2850fps with a 105 and 2700-2750 with a 115.
Thanks for the info. Didn’t see any pressure until 31.9. I hear what you are saying...that’s only .2 over where I am now in 50-60 dog weather.
That said, all barrels are different and the lot of powder will effect this too.
