Does any of the SMEs have an idea of the anticipated shelf life of the "new" polymer tipped ammo? Specifically I'm wondering if the polymer tip will "degrade" over time such as hardening, shrinking, etc. I keep my carry ammo for long periods, thankfully don't need to shoot much of it and I'm looking at re-stocking for basically a lifetime supply. If there are no anticipated issues I'll go with these since they are now priced the same as the older versions. I keep my ammo stored inside the house or in my underground storm shelter which is pretty temp stable at reasonable temps year round so the ammo itself is not really in question, just the long term stability of the polymer tip has me curious.