It will depend on the constriction used. For these flush mount choke tubes these are the notes you should be aware of from Carlson's:
"-Steel, Lead, & Hevi-Shot may be used in all constrictions with the exceptions listed below.
-No Steel shot larger than #BB or speeds exceeding 1550 fps should be used in choke tubes tighter than full.
-No steel shot allowed in our turkey constrictions"