No what ruined the 1-20 was hyping a 155gr bullet at 2500fps in the 1-20. A fast twist is just fine with 180gr and up. 200gr+ bullets shoot really sweet with that twist. Plus 45cal sabots are much better now. Numerous compaines jumped on that wagon..not just Knight. Traditions made fast twist 45s almost until they dropped the 45. MDM used a 1-20 too and White.

SML 45 guys use 1-22 or even as fast as 1-18 twist commonly shooting 200gr bullets over 2600fps. Mine is going to be a 1-22 but i want a 1-24 custom. I just dont want to pay the extra $150 to get it.