My Lr308 is having light strikes every one out of 10 rounds i called dpms and they said its because im using military surplus ammo and they have harder primers because they are made for machine guns. is this true? and if it is how can i compensate for that can i safely install a heavier hammer spring would that help? he didnt want to tell me anything besides that i should use american made ammo

order a heavier hammer spring

You can try the heavier hammer spring. You can also trim the tail end of your bolt which effectively makes your firing pin longer. And you might want to see if your hammer spring is on the correct way.

Thanks ill try the new spring