I\’ve been loading this bullet to 1.135 with absolutely no problems , UNTIL the day my daughter brought her new Springer EMP home . With factory ammo , no problems , with my reloaded ammo its as you described , a\” jam-o-matic\” . I figured out it is a tight chamber , so I bought a Lee undersized pistol die and a 9mm case guage . Now all my reloaded 9mm is sized with the undersize die and checked with the case guage . If the case guages correctly and falls out on its own when I turn it over , it will function flawlessly in her gun . If it is a little \”fat\” and wont fall out of the guage correctly , then it gets fired in any of our other 9\’s . When you use once fired brass you have to take the good with the bad , and what I think is happening is some of the cases are fired from large chambers like Glocks . I would say that about 5 to 10 % of my cases wont resize and guage small enough for her gun ,so these boxes are marked \”NO EMP\”. It is kind of a pain but really not that big of a deal , besides that little 3\” EMP is really a tackdriver and I wish I would have bought one.