I believe they are the Lyalvale Express shells that McIntosh spoke very well concerning (headstamp says "L-express"). I have a flat of 1 1/16 oz. nickel plated 7 WR that I bought years ago to shoot in a tight choked Husqvarna. Used them at a tower shoot and was amazed at how hard they hit the birds. I have not shot them in any of my short chambered guns since then because I could not find any pressure information for them.
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