Thanks to all who shared their experience and opinions.
I bought a bulk carton of 500 at SW because they had it and I wanted some cheap available ammo for close up pistol practice. FWIW, I shoot serious rifle competition with match ammo up to the top grade imports, but this wasn't my purpose here.
I ran about 100 rounds through a Ruger SR22 with nary a failure. Carbon fouling seemed minimal, but, as others reported, it left strips of lead in the barrel.
So, I'll shoot up this batch and won't buy more, if only because I don't want to have to bother with extreme leading.
Paul