Originally Posted by
fouronesix
I'm still following this thread and so far- very interesting! Actually what you are seeing is what I would have expected with these actions. They are fairly forgiving of out and out burst failure but tend to give a little at a time. While at some point, as you may find with measuring set back, they do "fail" in matters of degree. It is something I noticed with the one absolute torture test I did on the Modelo 1936.
Would be interesting to run the 7x57 load I used through QL (which I don't have). The load was 37 gr Bulleye under 625 gr "projectile".
One thing I see in the latest test with the 3031, maybe?, is that the pressures as predicted by QL may be slightly overstating what is happening in your tests. Seems like loads 1 and 2 should have shown more head expansion and primer flattening at the predicted pressures of 75-85Kpsi. ??? don't know really- what is your take on it?