Inserts are a great idea Fred, prior to investing in a gun. I obtained good patterns using skeet loads 20 to .410 but they are messy and guys have observed that the O-rings on the GaugeMate-Gold (the ones that stay in the chamber) tend to deteriorate quickly. A more expensive alternative would be the Chamber Mates or the Briley Side-Kicks. The Gauge-Mate Tubes and Little Skeeters are a pain, esp. for bird hunting.
BTW: I was making an observation about myself, not you, and as I said, you must make the call.
