Bottom edge of barrel hole to top edge of guide rod hole:

P229-1 slide ~.20
P228 slide .23

It's consistent with the previous measurement differences.

P229-1 barrel arrived, slide and new barrel went on to P228 frame no issues. Lock up seems solid. Based on inputs thus far I expect no issues when I go to the range to zero optic.

Thanks for posting the slide measurements.

Glad you got everything working.