You need a rifled barrel for sabots. They will just tumble out of a smooth bore. I'd skip the sabots and use challenger slugs. Hard lead. Good design and good penetration. Foster slugs are powerful but can lack penetration. I bought some Rotweil slugs a few years back and carry those and challengers. Brenneke slugs are great if you can find them.
Your 24" rifled barrel will handle any and all slugs including the sabots. But. You are not throwing as big of a chunk of lead at them. Most sabot slugs are .50 caliber, I believe, at shotgun velocity. Great for accuracy. Not as much knock down power as the 1oz or 1 1/8 oz hunk of lead you find in the other slugs.
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