I bought one on Tuesday and fired 1 magazine through it and thought it was fine. Yesterday and today, it is a different story. Feeding issues evolved along with light strikes and failures to go completely into battery, resulting in pulling the trigger and feeling nothing. All of this after disassembly and cleaning.
So I got my depth mike out and found that the head space was right at the SAAMI minimum of .043". Checking the ammo, which included WW HV HP, Federal HV HP, CCI velocitors, CCI Blazer and ELEY Club, and found that rim thickness runs from .043 to .048. which may explain the trouble of not returning completely to battery. Also accuracy at 30 ft. is abysmal running out to 8". Ely club did manage a 3" group, which I would settle for because it is on a par with the LCP in 380 that I carry. So I disassembled and cleaned it again and noticed that I could find no indication that there was any rifling in the bore although there must be some because the bullets were not tumbling or making oval holes in the paper.
So, it don't sound good does it? I will try another 100 rounds or so and if no improvement, I'm gonna call Ruger and politely ask for a mailing label to send it back.