I was trying to shoot Fioochi 410 target loads at Rock Mountain last weekend . My Iver Johnson Hercules wasn’t always setting them off , so I borrowed a friends Iver Johnson Skeeter same result . The same friend gave me two boxes of another brand problem solved . So I’ll not be buying anymore Fioochi atleast for the 410 . Seems they have a harder primer . Worst part of this is I lost several targets for ammo malfunctions with hunters rules and the fact that I have an unopened flat of Remington STS 410’s here at home