I have what may be a stupid question/ observation. Given that the CIP standard for BR Norma has a diameter of .472" at .151" from the bolt face and a .01199" per inch taper, my math is showing .4714" at the .200 line. My reamer print, which is a modified wheeler spec, is also .4714" at the .200" line. It was stated earlier in this thread that alpha based their spec on the CIP standard. How can this be the true if their reamer spec is smaller? Am I missing something here? I'm just a little frustrated as this thread explains all of the problems I have had over the last 1.5 years.
6BRA Alpha Brass question
- Thread starter savageshooter86
- Start date
Alpha Brass
Alpha reamer
Micron sizing die
14-15 reloads and still going strong
108gr at 2930 fps 28” kreiger
Alpha reamer
Micron sizing die
14-15 reloads and still going strong
108gr at 2930 fps 28” kreiger
DJSBRS
Site $$ Sponsor
The Alpha OCD brass doesn't require a FL size after firing in a Lapua chamber at the .200 line. If you FL size it for a Lapua chamber, it will never expand enough at the .200 line to grab the side of the chamber. It will thrust back to the bolt face and cause heavy bolt lift or click.
My .02¢
DJ
shoot4fun
Gold $$ Contributor
DJSBRS
Site $$ Sponsor
Surely somebody will think I am talking out of my ass, because my head should know better to say anything.You and I both know that observation is worth well over 2 cents!
Bill Norris
Back in the Day
Danged if it ain't drilling no doubt.
You have a die to recommend just a bump and neck size?
Well at least it is working for one person! Wow, what a nightmare for most though. A very good thread on, "what not to do". So, Lapua brass it is and always has been. Sorry for all the hell a lot of you have gone through. Another brutal learning curve for sure.
Paul
DJSBRS
Site $$ Sponsor
Buy a Newlon blank and run your chamber reamer in correctly so it will bump the shoulder only. Or order a Redding neck sizing die only.
DJ
Could you just buy a Forster 6br bushing bump die and run the bra reamer in to the same headspace as br?
DJSBRS
Site $$ Sponsor
Couple of barrels chambered no problems. Lucky I guess
Ccrider
Gold $$ Contributor
Alex chambered my 6bra. I started with Alpha brass. It shot perfectly in the lower node with less powder required to get there. I began to have some bolt click at the middle node and heavy bolt click at the upper node (2990+-)
The brass shot small at all nodes and with less powder. No way I could run the gun at the middle and upper nodes without upsetting the rifle.
2920-2930fps shoots small and no clickers.
Going to try some Lapua brass here soon. Will see how it goes. Also have some Peterson. Dj hydro former it to Bra for me. See if it makes a difference.
JEFFPPC
Gold $$ Contributor
I can verify the shoots small.
Merry Christmas Jeff! Hope you and Naomi have a great day.
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