Back in the summer about two years ago I was shooting my 7mm rifle through a conograph. When I got done I happened to notice that I had a little Freedom Arms 22mag. in my pocket so I decided to shoot it through the conograph also. The gun shot about 275 - 325 feet per second. I could not belive what I was seeing. I went in the house and got fresh ammo and the gun went to around 1000 feet per second. I had carried the gun in my pocket for about three months with the same ammo in it. Now I change the ammo out every 30 days to be on the safe side. Have any of you ever checked your ammo that you have carried for a period of time? Or have you had problems with ammo that has been carried for a while? Thanks.