I had the older 55-300 non-PLM and moved up to the PLM version when it became available. Here's a few of my favorites taken with both versions of the 55-300 and either the K3 or the K1 II.
Pentax K-3 - HD Pentax-DA 55-300mm F4.5-6.3 ED PLM WR RE
Pentax K-3 - SMC Pentax DA 55-300mm F4-5.8ED
Pentax K-3 - SMC Pentax DA 55-300mm F4-5.8ED
Pentax K-3 - HD Pentax-DA 55-300mm F4.5-6.3 ED PLM WR RE
Pentax K-1 II - HD Pentax-DA 55-300mm F4.5-6.3 ED PLM WR RE
Pentax K-1 II - HD Pentax-DA 55-300mm F4.5-6.3 ED PLM WR RE
Pentax K-3 - SMC Pentax DA 55-300mm F4-5.8ED
Pentax K-3 - SMC Pentax DA 55-300mm F4-5.8ED
There's more in my Flickr
stream and
albums. (I'm much better at posting consistently there than I am on the Pentax forum.)