Wanted to provide an update. It seems the rifling in the P30sk might be closer to the round when in battery compared with the P30L and that's causing the issue. Keystone is aware of the issue and has seen it in more than one compact 9mm gun. All of their new ammunition seems to have solved the issue.
To test the theory, I've taken their new ammunition to the range and it works perfectly fine in my P30sk.
They claim it's new ammo only. They gave me new ammo for free with the promise that I wouldn't shoot the old ammo in my P30sk.
Unfortunately I can't enjoy the old ammo as it's my son's P30L. The only big pistols I have at the moment are an HK45t and an HK45ct while I wait for my USP 9 tactical to come in. :(