I have a Savage Model 99E, when I first started to shoot this firearm, I shot 50 rounds with no issues, took the rifle apart and completed a deep clean including the bolt and firing pin assembly. When I put it back together and began to use, several of the primers would not ignite (possible "light" strike). If I wait, then cycle the same cartridge in to the breach, about 90% of the time the primer will ignite. Any ideas about why this is occurring?