edelsite
the issue is that 209's come with differnt powers... some 209's could actually puch the bullet off the powder before the powder ignites... That is the issue and it is possible.... I does not happen to me and has not especially if you take care of your powder and the load in your gun..
I would suggest that you do not get primers that are on the very hot side... I use an old primer that is no longer available a Remington 209-4 especially developed for a 410 shotgun. Then the regular Winchester might be the next best choice...
Just my 2 cents...