This is one of those.. youll have to shoot them to see but Im saying the .662 is your huckleberry.
Thanks, I have that Hevi 13 .662 in a 21”bbl Rem 870SM. It shoots incredible with the Hevi 13 3/2/7’s.
270’s in a 10 @ 40yds . For some reason it didn’t shoot too well out of the 26”bbl. May be totally different with the TSS as I have no experience with those shells. Only have 5 so hoping to start somewhere in the ballpark.