Tim
All the handles broke right at the bottom of the flat handle. Yes I lube the joints.
All broken handles occurred with Lapua Match brass 6mmBR, 220Russion, 30-06, 243. I do primer pocket uniforming. This will lower the primer about two thou below the base. Primers are seated so they are tight to the bottom, which needs the extra push in a clean pocket.
The last lot of new brass I had to use the loading press, so not to break the handle again. They were tight small Federal Match primers. Next time I break a handle I will send you a picture.
I have never broken a handle with domestic brass which is much softer and has a bit of give to it. Fed primers are the softest ones and give reliable ignition.
Yes I do know how to prime brass, however I am the only match shooter in our club that uses the Lee Auto Prime, and been told to get a stronger Auto prime.
Lately at a match I take a small Lee press and do a manual primer job clamped to
a loading table. As it is I only have to make 100rounds at the range because I only have a 100 cases the first 100 I make at home.