I don't have the SR40 but do have an SR9. I got it about 7 months ago..my very first handgun. I probably have close to 1000 rounds through it. I have not had one single failure to feed, fire, or eject. I have fired mostly Federal 115g FMJ at the range and various different hollow points including +p and +p+. Everything has cycled fine. The SR's do have a reversible backstrap. I went to the gun shop intent on buying a Sig P250, but the guy showed me the Ruger. I'm glad he did. Made in America also.