.177 greens can go supersonic. If you are getting over 1000FPS with lead quite possible the lead free will get very loud.H&N Barracuda Green are lead free. They are light though. I use them as we have chickens, they eat pellets and gizzards will not pass them. In .177 the drop cottontails with head shots. Slug will be flatter and carry the energy better, longer.
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