I would think that it would be safer and perhaps more accurate to remove the choke tube from the Cutts body when shooting slugs. If you do use the choke tube, I would not use a sabot type slug. Over the years I have seen too many blown Cutts. Most were blown by plastic shot cup wads. The wads would get stuck between the muzzle and choke tube. The next shot would blow the end off the Cutts body. These type chokes fell from favor after the advent of fingered shot cup wads. The Poly Choke system prospered in this era until the screw in chokes appeared.
I have seen a few blown Poly's, but I believe most were blown by slugs or large buckshot being fired with the Poly cranked down to extra full.
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