Machamp Attack IV Question

https://www.youtube.com/watch?v=5Pp0nZcNq3s

I personally would keep KC as I love the animation and find it super fun to use, i actually have a 100% maxed out C/DP and another 100% level 20 but I am thinking I will power up instead my 96% level 20 with KC/DP because I want something different. Enjoy the game how you see fit and makes you happy we are taking the slightest of differences that aren't even noticeable.

https://www.reddit.com/r/TheSilphRoad/comments/6l2msh/raid_damagecalc_find_damage_cutoff_level/

For Machamp with 15a IV, Karate Chop has its last breakpoint against Tyranitar raid at level 36. Meanwhile with 13a IV, that breakpoint is at level 37.

So your level 39 Machamp is already past the last breakpoint for Karate Chop.

never lose KC, ever! KC has the highest EPS of the Machamp quick moves, so you could use dynamic punch a lot more often, even bullet puch despite his lack of STAB is better than counter for the exact same reason