Reloading .303 British : No. 4(T) Results with R-P Cases

I used to swear by R-P cases back in the 80's.

Then, a few years back, 2011 from my records, I started discovering odd things myself.

I had a sudden rash of odd case separations. Not in the usual 1/4" forward of the web but much further! These were the same dies & settings I had been using too. It was indicating "imminent failure" at the first reload!

Nothing else had changed, same rifle same load, same bullet & so on.

I've had case separation occasionally but it was after several reloads & nowhere near as commonly or as widespread