I’m also really pretty good with a handgun (i compete a lot) so i don’t see a lot of accuracy gains from PCCs.
I would bet that >99.9% of shooters will see a vast improvement in hits and speed while using a PCC versus a handgun
In fact, the less experience a shooter has, the better they do using a PCC versus a handgun
As I've said here before, I specifically recommend PCC's to new shooters, and try to dissuade them from a handgun
One of the biggest shining points of a PCC is how you can take a novice, and with very little practice...
You can have them making better and faster hits than an experienced pistol shooter
I've seen many an ego crushed by novice shooters using a PCC
I too have shot competitively for decades, local/state/national, including Master and High Master at NPSC for a number of years
And guess what... I will beat myself if I run a PCC through similar scenarios
Shoulder fired, low recoil weapons will do that