Just wondering if anyone here thinks it's safe for me to use Stingers in a bolt action Cooey Model 75. I wanted to enter this rifle in a simple rimfire competition and have a few kinds of ammunition to test out to see what it likes. I know the casings are a little longer but the over all product is about the same length as any other .22 LR. I heard some people damaged their firearms with this cartridge, hence the reason for me asking.