Originally Posted by
StevenDJ
Thanks to everyone for your suggestions. I am thinking that regular mild steel is just too malleable for this task.
I think I will try the hydraulic repair shops in our area. I live in a rural area and there are lots of machines to be maintained so I will see if I can find an off-cut of this honed tubing you speak of. A brass nipple threaded into a brass nut should given an extra measure of stiffness if I try that method. 20 tonnes is really an incredible amount of pressure!
I'd really like to increase my densities as I am loading 25-20WCF and I can only fit about 13 grains by weight of powder in the cases. It is "supposed" to fit 17 grains of powder. My current density is more than sufficient for loading my shotgun.
Back to the drawing board...
ALMAR, I have been tumbling my corned powder in a second ball mill jar and found that this does an excellent job of knocking of the sharp corners. I re-screen when I am done and find that I end up with a little less 2F, no change for 3F and a little more 4F. I just drop about 5% of the powder down a grade. I like tumbling it because it gives me another process and I like the tinkering. It looks better, but I have not been able to measure a change in burn rate yet. This is what my 25-20WCF is for, but I am still waiting on dies to be delivered.