At any rate, I plan to get the correct magazine. 308 rounds, and I cannot see any type of connection between the magazine and the full auto problem. My question is, if it’s not the firing pin, what then could be causing the rifle to fire twice? The box magazine is marked 284 but functions fine for. I’ve not disassembled the rifle yet to verify the firing pin repair, or otherwise exam the internals. in 2019 according the Winchester representative I spoke with. The new pin was installed by On Target, Inc. I had previously called the Winchester Product Service telephone number, 1-80, and was advised that the original firing pin recall had been taken care of for my serial number (serial # 899XX). I put about 40 rounds through the gun before this started happening.

To make a long story short, the rifle will now fire 2 rounds (full auto) when shooting. I found and installed a vintage weaver K-3 scope, and the rifle looks great. The firing pin can break and lodge in the bolt causing the firearm to 'slam fire'. If you own a Winchester Model 100 STOP using it and bring it in or call us so we can check the status of your firearm. Due to the ammo shortage, I didn’t get to shoot until several months later. This is an old recall but we serviced 2 rifles this month that had not had the firing pin replaced with the improved version.

Winchester 100 recall firing pin