Craig,
You may find that a set of cut barrels will not have enough thickness for even the thin wall tubes. If they were 30s cut down to 26 you are now back into where the barrels are nearly at their thinnest. Maybe even into the 20 thousandths.
If you find 28s cut to 26, 30s cut to 28, etc. you may get the thin walls in there. What you are probably looking for to get 24" barrels are 26s that have been cut 2". Probably rare.
But if they are .729 I.D. or thereabouts straight bore from end to end after having been cut and with thin wall thickness it will not work. They have to have enough metal to thread them. Long story short: you'll need to know the outside and inside diameter and thickness where they are to be cut and the tubes installed. Otherwise you'll be stuck with a set of cylinder barrels.
Just my opinion (from experience).
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