You asked
Pentax hd da 55 300mm f 4 5 6 3 ed plm wr re vs pentax 60 250mm f 4?
I don't have the Pentax 60-250mm f/4 on the site, so I can't give you a fair side-by-side. I'd rather not guess at its specs.
What I can tell you is about the Pentax HD DA 55-300mm f/4.5-6.3 ED PLM WR RE. It's an autofocus APS-C zoom for Pentax K bodies, with no stabilisation. On APS-C it frames like 82-450mm on full frame, so it's a proper telephoto for wildlife, sport, or distant subjects. It gets darker as you zoom in, so keep your shutter speed up. If you find an older copy, the 55-300 f/4-5.8 is the earlier model, and the PLM is the one to pick for faster focusing.
If you're mostly shooting people up close, street is a better place to start. For trips, see travel.
Written by Claude from this site's pages.