Well ... right now all I can say is 'I think it was DP-tuned gun', but I won't commit to that until I ask. I am quite sure they said DP was somewhat behind schedule on delivering her gun ... but it is possible she just acquired a SM through DP. And I would not describe her gun as 'tight' in the sense that Springfield made their 'FBI' 1911. I was helping do some dealer shows when that model first appeared and it was so tight no one jacked the slide open on their first or even second try. It was locked-up like a bank vault.
But that is not to suggest this SM is 'loose' by any means. To me that seems to be one of the finest, most difficult parts of pistolsmithing - to build a 1911 so the slide opens and closes w/o any hitches or lurches but yet locks up even and rock solid. This SM slide glides almost as if it was a straight blow-back design, i.e. as easily as my just-acquired TruBor that has +/- 10,000 rds. thru it. (And I have fiddled my way thru polishing and beveling and running springs so light they just can't always strip a round from the mag.) Understanding I am a rank amateur - my first comment when I briefly got to handle the piece was 'did someone already cut the recoil spring?'
So - to clean/oil, get tape on the scope mount (great tip BTW), assemble some mouse-fart loads, and grabbing an assortment of recoil springs seems to be in order. My guess? - a heavier spring for WWB ammo, or lower pf reloads ... but i dunno. We will report back when we hear from DP and get some test rounds thru it, k? And again I thank you all for your advice and experience. So many things you may take for granted are entirely new to some of us.
And all of this reminds me - I still need to get over to the smithing section of this forum some night for some help finishing a Kart install to a 6" Fusion. I don't hear too much about them (Fusion) but their fit and finish ranks them far ahead of my first, worst experience of putting a STI slide/frame together. But 'tis 3 AM now and all I can say is ...
Buy buy.