I've used the Gaugemate Golds with Remington STS loads in my Lefever 10 gauge. They worked very well. The Gaugmate Gold design permits easy shell extraction and is simpler than the Seminole Chamber Mates, which are a nifty 10-20 insert. With the Gaugemates, the entire insert rides out slightly on the gun's extractor/ejector system to permit removal of the shells. With the Chamber Mates, the insert stays in place in the chamber and a slide hangs on the gun's extractors/ejectors and rides out with the extractors or ejectors to permit removal of the shells.I am a mechanical moron, but it seems to me that there are pros and cons of each. The Gaugemate Golds are simpler, but the Chamber Mates produce less friction, and less potential wear, since only a thin slider is hung on the extractor/ejectors and moves with it, whereas the whole insert moves in and out with the Gaugemate Golds. Anyone else have any thoughts on this? Both systems worked like a charm for me.
