I am not at my home computer right now. On it I have several loads which are Flues safe. All loads are tested or from known sources. I will pm them to you this evening. One I use for hunting is AA 7/8 ounce at 7k. For clay target I use a 3/4 ounce load that is even lighter. Best thing to do is pick one, load six shells up and send them out for pressure testing. A very cheap thing to do for total peace of mind.
Have you checked the chambers to see if they are still 2 1/2”? If they are don’t alter them. Nothing makes a gun stronger by removing metal at key stress points.
