Twist Rate of Shaw Barrels

What is the twist rate of the Shaw barrels that you put on your guns?

20 gauge barrels are 1-23 twist
16 gauge barrels are 1-30 twist
12 gauge barrels are 1-28 twist

TarHunt pioneered these twist rates back in 1992-1994.
Since all the other companies didn’t care about slug hunters at that time they just copied TarHunt findings as they were published because we were getting all of the publicity.

Our RSG-12 bolt action was introduced in 1992. That’s what generated all the interest in sabot ammo 1992-1997. Do you think any advancement would have been made without the introduction of the TarHunt Professional RSG-12 back in 1992, I think NOT?