Originally posted by PJ1 If you were using a tripod, Shake Reduction should have been turned off.
Originally posted by slr_neophyte set the self timer so I would not have to touch the camera
Shake reduction is automatically disabled when the self-timer is used (at least that's how my K-5 works), so that wasn't the problem.
Originally posted by slr_neophyte shutter speed was 1/4000 (I think), and aperture was 5.6 ... wind
1/4000 is a very fast shutter, probably fast enough to ignore the wind as a factor. I wonder if that shutter speed made your ISO go very high. Image noise from high ISO can blur fine detail.
As others said above, the 55-300 is a good lens but is at it's best stopped down a little. I almost always use Av mode for mine to keep it at f8.0. I shoot in raw DNG and apply a little bit of sharpening in Lightroom.
How were you focusing, liveview (contrast detect), viewfinder (phase detect), or manual? Your camera+lens combo might benefit from the autofocus fine tuning menu.