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[Ed750]

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[montana]

Look at the pic you posted. The slug on the box is rifled. Yes they are fine to shoot in a cylinder bore (any other chokes at your own risk, some are fine some arent).

[Sam .223]

I've shot them in my smooth bore without issue.

[BigFatGuy]

I like those slugs... they make beautiful holes in paper, with cleanly serated teeth

[lowdive]

sabot slugs are meant for rifled barrels. these are fine/designed for smooth bore. the rifling on the slug is supposed to help give it spin and keep it stabilized in-flight.

[bjl333]

Use slugs only in a barrel with Cyl, Skt or IC chokes. Any tighter will cause the choke constriction to expand and shot pattern might be affected.

[sargenv]

What I do for checking slugs and fit in chokes is I cut one slug loose and see it if will press fit through the tightest choke I want to use.. I've had success with S&B slugs through a modified choke.. again, test the choke you want to use.. if the choke is loose, try the next tightest choke until you get a snug fit.. this only applies to screw in chokes..