Mike,
The trashcan even had one of those hinged lids, so everything stayed inside. So in the garage 14gr was 1 for 1 successfully blowing out the case. I replicated that load and tried it at the range for another 8. Only one formed. Weird. I did not yet try Curl's method for annealing the case mouths. That's next.
The one round I did try was 12 o'clock on the paper at 25yds, but quite high...4-5". That was with a 350gr unpatched .458" bullet over 45gr 4198.
Also shot two 500BPE rifles with NfB loads. Went well. Will start a different thread on those results.
Chris
