If your a reloader you can get some very good performing sub-sonic loads. I have had good luck with Maker Bullets for my Subsonic expanding load.
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Left: Maker Rex 220gr, Right Berry 220gr plated
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This 220gr Maker Rex was fired into a line of milk jugs full of water at 50 yards. It split the first two wide open, punch a ragged hole through both sides of the third and was found in the fourth. Shooting armadillos with it have proven very good. Sounds like hitting a truck tire with a hammer.