We have the same problem with the bulk Remington ammo. We can normally feed the duds through our rifles and they will fire. Though we switched to Winchester and Federal and haven't had as many problems with them. I figure when we are just playingg aroundI don't mind a few duds since we can save money. I've notived when we buy the more expensive rounds we don't ever have any problems with duds. Though since we go through around 1500 rounds on a weekend with our pistols I figure 5 or so duds is a small price to pay to save some money.