Smooth.
And since you made that point... what could/would the downside of using a rifled slug in a smoothbore be? And also a non rifled slug in a rifle shot barrel?
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Marlin 882SS .22 Mag | Stevens 200 .308 | Mosin Nagant M44 7.62x54R | Maverick 88 12g | Mossberg 702 .22LR | FNP-9 9mm | RRA AR-15 .223 | Kel-Tec PLR-22 | Taurus PT-1911 AR .45
US Army Reserve
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