i am wondering if the above possible problem exists and if anyone has knowledgeable feedback or experience with said long term in mag storage. i am thinking that steel case would be more likely to cold weld than brass. and wondering about the issue with "bi metal" cases as well as brass. i have seen very long term storage in WW2era guns with same dated ammo in mags that did work when tried up into the 70s. these 2 examples were 1911s with,of course,steel mags. i have no metallurgical knowledge,so just asking about a potential issue with very long term in mag storage,say 10-20 years. i do know that minty german WW2 made 8x56 & 8x33 was sold and shot 5 or so years ago (even now). i know ammo itself will stay "good" for many years,even non corrosive stuff. WW@ era 30-06/30 gov rounds fired as expected up into the 60s & 70s by my father and i. tx for any feedback.