I have a sporter weight 597 that has run perfectly with factory 10 rd metal mags since replacing the extractor with a Volquartsen. Reloading the factory 10 rd mags gets old plinking at the range so I'm looking for one or more extended mags but I'm not sure which are the best. The ones I know about are from Remington, Champion and Promag. Does anyone make a reliable extended magazine for the 597, possibly with last round hold open although that's not a deal breaker.
