I purchased the Savage model 12 BTCSS varmint rifle in 223. Very accurate rifle, but after about 50 rounds the firearm will now not properly feed a round into the chamber. All it does is jam the nose into the throat and damages the round. I was told from Savage that it could possibly be a bad mag. They sent a new one and the rifle will still not feed a round. Has anybody else experienced this problem? I have sent the rifle back to Savage for repair. Thanks