By the way, my little Greifelt gem weighs 5 pounds 6 ounces, yet is sized for a mature adult shooter. I have some RST Lite 3/4 ounce loads that should be proper for a gun of this weight. I have still not found any evidence of an underlever Greifelt on the market or anywhere except a Model 510 in a catalog with no description or price. I suspect it was a drilling, not a double gun.