part one so far... this should be interesting.
It's tough to be too conservative with such a thing.Problem is there is no vent hole for the gasses to go if a case ruptures. All that hot gas gets vented back in the shooter's face. So I would be very careful shooting anything but standard factory ammo in these guns. And if you are worried about such things, any competent gunsmith can rectify that slight design flaw to a very robust rifle.