because the fiveseveN pistol is blow back design the cartridge is partially ejected while under high pressure. this is what causes the stretching from all I have been able to read on the gun. continual setting back of the shoulder will weaken the shoulder area and cause splits but head separation is only likely after several loadings. from what I have read 2 to 3 loadings are common with some intrepid souls going many more. the reason that FN put the coating on their shells was to delay the ejection until pressures drop thereby mitigating the stretch in the short guns.
going to be interesting reloading with a whole set of new rules.
the consolidation of the states into one vast republic, sure to be aggressive abroad and despotic at home, will be the certain precursor of that ruin which has overwhelmed all those that have preceded. Robert E Lee
~Molɔ̀ːn Labé Skýla~
| 
