I got in some cast lead bullets from Missouri Bullet today, 148gr DEWC, flush seated. Loaded up six
[yes, only six] rounds with 3.0grs of Red Dot. All six fired OK; one stovepipe on ejecting (no surprise there); five of the six hit paper. Mic'd the barrel after cleaning, no expansion. I didn't think there would be, but good idea to inspect, methinks.
No idea what kind of load S&W set this pistol up for, no specs anywhere (S&W sent me the owners manual; no load data in it). This seemed a fairly tame load. I shoot 3.5grs Red Dot behind a 158gr LSWC in my S&W Model 15 w/2" barrel and that has more felt recoil than this 148gr load.
I'll load up a dozen or so of 3.0grs and a couple 2.5 just for S&G. And see if I can hit anything.