Not sure on the pressure specs, but have found that they've given me no problems in the field (29gns of original 7.62 x39 powder behind a 90gnhp Nosler TNT for about 2850 fps) & hold together well....no letting go @ all. In the USA they get factory steel cased ammo shooting 100gn fmj/sp that were/are manufactured originally in the Combloc countries so have used that as a baseline quality control measure. There is a ytube listing that shows a Brunel hardness testing experiment that shows that the hardness of brass & steel are about the same (I'll see if I can find it & put it up) & I've found the resizing effort is also about the same. I can reload the steel 3-4x before I get split necks, but normally when I have to follow up game quickly I just leave the steel shells on the ground.
Accuracy is still good enough for me (1.5-2inch & 100yds) through my Howa Mini action stainless.
If anyone wants to try a few I can send some pre primed shells for you to try.....you pay post or call me on 027 7175260.
Phil.
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