Thanks guys, I did read his awesome evaluation (actually I gave him props in my post above). Great info. and real world testing. After reading it, I picked up some One-Shot and WD40 Specialist.
I ended up using the Otis solvent/patches on the bore and muzzle and a little bit to clean the bolt and slide, with a small amount of #9 oil on the slide and rails, CLP on the mag tube and components, some One Shot to clean the piston and components.
This thing was filthy and caked with old grease! I went to town with a few brushes and q-tips and it cleaned up nicely. The barrel took about 13 patches (6 pulls per patch) with a brush every other pull before it came out (almost) clean. I finished it off with a few pulls with a bore snake and One-Shot.
Broke it in today, 70 rounds of a variety from 1oz slugs and 9-shot buck to birdshot, and 1145 fps low brass target.
This thing is amazing...such a nice piece - surprising low recoil and easy to reset for follow-up groups. The slugs were by dangerously fun and accurate. 10" groupings from 45 yds. right out of the chute
I only had one FTE, with the Hornady 00 Buck (9- shot, 1200 fps). That is also the only round that I could not fit (7) in the tube, since it is almost 1/4" longer than the rest. The rest cycled fine, ejected perfectly (out and away), good patterns/groups, even the low-vel. lightweight target loads were running great!
I had to end it early but I am eager to get back out there asap to put it through some more! Got some new stuff to add in my build thread too