I own a 11-87 supermag and absolutly love the gun. Last duck season during extreamly cold weather the gun started cycling poorly. After cleaning the gun and finding nothing a miss and a good cleaning and a lite oiling (really lite) I reassmbled the gun with the same results.. No change in shells or anything. Only happens during really cold temps. A fella was telling me that i should drill out the exhuast ports. Never heard of this. Havn't googled it or anything yet, just wondering what all the people on here thought about this. Thanks.