Following Jim's recommendation, I ordered 500 200gr .451 LRN coated bullets from Bayou Bullets a few days ago. Loaded up 50 of them ahead of 8.3gr Ramshot Silhouette, took them to the range Friday morning. That powder charge is definitely on the warm end; the Tanfoglio Witness (all steel version) handled them well, allowing me to drill the 12x18 outline target, ah, to good effect. The S&W M&P Shield was somewhat outmatched, got pretty frisky in my hand with that load. 30 rounds through it, not much damage to the target though. This morning I cleaned both guns. Not even a hint of lead fouling in either bore; that coating works. No smoke downrange, just as Bayou predicted. A thin coat of soot spread around the guns' innards from the Silhouette, maybe would have gotten to be a problem sometime after 70-80 rounds I'm guessing. Going to load up another 50 rounds with the charge lessened to 8.0gr, to see if the Shield likes that better. The Witness doesn't seem to care much what I feed it, but I'm going to challenge it with a couple mags of +P, Hornady 230gr TAP CQ. Hornady claims 960fps at the muzzle of their test gun, probably a 5" barrel 1911. I won't even consider trying them in the Shield. Maybe Tuesday morning.