I have a Ruger LC9 and it is very ammo sensitive. When I first shot it I was very disappointed in the accuracy as it was all over the place even as close as 7 yards. Then I tried some Win Silvertips I had laying around and a 124 lead round. Both were more accurate and very reliable. I don't know if it is the short barrel but it definitely has its likes and dislikes when it comes to ammo. I don't know if this applies to other short barreled pistols but I would not be surprised if it did. YMMV