Quantification of neck tension.

[N555]

Yeah don't over think it. My buddy burned up an entire keg load developing for his rifle, so he has about 1,300 shots on his barrel and he was fireforming new brass that whole time and hasn't even reloaded any rounds for it yet. I was fully load developed by 400 shots and most of that was running reloaded brass.
He would load up say 10 rounds at 44gr, then 10 rounds at 44.1gr then 10 at 44.2gr and so on.
I didn't need 10 shots to tell when a load shot all over the place and I jumped up a half grain at a time and loaded 5 shots.
So when I fired shots at 175 yards and they were making 2 to 4 inch groups then all of a sudden I get 4 of the 5 holes touching, I figured I was getting pretty close.

 

[AJC1]

Gee thanks guys, I'm still sorting out OCW and ladder nodes by speed or accuracy. Not to mention which brand bullet at which weight shoots best in this gun. Jamb or Jump. So much to do, so much barrel life.

It's about trying to maximize data points for every test. Pressure testing,velosity nodes and accuracy all in one. Plus your fire forming all the while. The part I find most difficult is where to end testing and just go!!!! I don't even test different brands of primers, that could be many more rounds.

 

[peels]

Thanks for sharing the interesting test and results!

My takeaway is that the test affirms glowing brass during annealing is overdoing it. Over annealed brass tends to loose the ability to spring back, and thus end up with low neck tension.

 

[GW Staar]

I'm just glad jmorris is curious enough to test the theories. It appears to be correct how he has taught annealing, every since he made and demonstrated his nifty saw blade annealing machine. Might be a good time to post that one more time for those who never saw it. Lots of new blood here now.

So little barrel life.

The horrors!......and the reality.