Took my new to me used Sig P-229 in 9mm (non-rail)to the range for the 1st time. The older P-series Sigs as a whole are pretty much trouble free, so instead of shooting a couple of hundred new rounds though it to see if there were any issues I dug out 150 rounds of the sorriest looking mixed lot of fmj and assorted hollowpoints of different brands that I had in my ammo stash. Most of the ammo had corrision around the mid section and primer area and a greenish patina over the rest. Stuff that you look at and go yuck..outta toss this stuff. The Sig gobbled them all up and never bobbled once. I was surprized as I had figured that I would get a chance to pratice a malfunction drill or two using this stuff. All the rounds hit near the center of a 8" paper plate that I was using as a target from 10-15 yards range. Load mag..aim..bang, bang, bang .......bang till the slide locked back.Repeat.. till the ammo was gone.Nada problemo. Just a great sweet shooting pistol. Finished off the day by shooting up the box of new ammo that I had brought along with me just in case the Sig choked up with that grungy stuff.