Mauser06 ,
I found 2 speedshells in the fanny pack I was wearing last season , both still loaded with 100 grains of Pyro RS and roundball . They had been in and out of the house , taken to the woods for hours , then left in a scent safe bag in the car overnight many times . After the season ended , they stayed in the house through air conditioned Summer , and heated Fall . When I took my ML to the field to sight it I loaded it from those 2 speedshells first . BOOM! both times .

No , I don't see a problem there .