I was talking to a friend today about this issue and I'm not finding that post.

https://sigforum.com/eve/forum...490098015#4490098015

Member copaup

This one?

Yeah, that's it, thanks

It isn’t something that happens overnight, but I’ve seen it enough I download my long term loaded guns by one. It seems especially likely with Federal. Not so much crushing the shells, but breaking the crimps and causing buffer to spill everywhere.

With really extended storage (years) I’ve seen some pretty distorted hulls. It’s not just shotguns. I recently downloaded an old Winchester 30/30 that had probably been loaded for decades. Multiple projectiles were telescoped back into the case. I never would have expected that, but I guess slow and steady force does win the race in the end.

This is an interesting phenomenon that I would have never suspected could occur.

I have some Winchester "Military Grade" buckshot rounds that will take a serious kink/bend if left in the tube for a while fully loaded. The commercial Federal and Winchester Ranger rounds I switched to after noticing this seem to be stronger. I also keep the tube downloaded by a round as an additional precaution.

quote:

Originally posted by sigfreund:
This is an interesting phenomenon that I would have never suspected could occur.

Neither did I. First time I saw it was in an 870 that had been sitting loaded in the back of a closet for at least 5 years. I’ve seen it a few times since, always in a fully loaded tube that’s been sitting for an extended period of time.

At first it really confused me, but when I think about it it makes sense. The tube is obviously wider than the shell to make room for the rim. That gives room for the shell to flex, especially where the brass and plastic meet.

Plastic is plastic. With few exceptions it flows (albeit extremely slowly) under pressure. I believe it’s that slow but steady pressure from the spring at maximum compression that causes the hull to either start to kink at the junction or collapse back slightly over it leading to a bulge.

I’ll dig around. I doubt I have any of the 12 gauge left, but on pretty sure I’ve still got one of the telescoped 30-30 shells in one of my boxes of junk.

I’ve never seen it in a gun I downloaded or a short tube. I don’t tend to leave short tubes stored loaded though, so I really have no idea on if something like an old Wingmaster would be affected.

Interesting. I've never left a shotgun tube loaded long term.

I have seen shells in magazine fed shotguns squished out of round in intense summer heat. Top 3 gunners who shoot open division often keep their shotgun ammo in a cooler, believe it or not.

quote:

Originally posted by sigfreund:
This is an interesting phenomenon that I would have never suspected could occur.

They move teeth with a simple rubberband affixed to it. Same principle-small amount of pressure over a longer period of time.

I keep my scatterguns in "cruiser ready". Once a month I unload the magazine and swap out the shells that were in the magazine with the shells that are in the side saddle. Just part of keeping things ready.