I shot tons of ammo thru my SS(s) in .40 .
Load them Long ... I ran 1.185 I know some that run 1.20
I ran WIlson 47D mags for a long time, then came to rest using Tripp 10mm mags.
The advantages are:
You get to shoot your same limited gun ammo
Brass is always available (and typically cheaper)
Slide forward reloads practicallly fall in (due to the extra empty space, 8 rds in a 9rd mag)
Cavets:
You mostly have to "roll your own" Reloads The ammo needs to be loaded to 10mm length for 110% reliabiltiy..
* I'm sure there are some that will eat factory length, but not the norm.
The only other, that comes to mind: During a slide BACK reload, You'll want to "SLIP" in it, like your sneaking in the driveway, 10 minutes late.
Otherwise, if you SLAM it in, with the extra space in the mag 8rd in a 9rd mag, the inertia will compress the spring and can wedge the next round between the feed lips.
and the cause the worst DEATH JAM you can imagine. * ask me how I know*
Of course YMMV
They do POP up every now and then.
Over the years, my friend Robert and I have collected/procured 17 of them.