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@Glock19Fan: "I was really suprised at the results of the .22WMR GD. Gold Dots have been known for weight retention and deep penetration, and although I figured the extra velocity from a rifle barrel would cuase some fragmentation, I didnt think it would be to this extent. "
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That round was designed for a short barreled handgun, and the factory published product ballistics are 1050fps from a 1.9 inch barrel. Out of a rifle, it might have twice that velocity. Speer makes a fine product, but surviving at twice the design velocity is a lot to ask from a hollowpoint. A 2-4 inch handgun barrel as you mention will be more representative.
The 9mm certainly did well!