Since I got this gun a little over a year ago, I haven't shot it much, and I haven't had very good luck with it, either. Granted, a lot of it was probably me... I bought the gun very slightly used, it's a 453 in 17 HMR. Since the day I got it, it's had a problem kicking out the spent shells. Now, I don't know if I'm babying it, or if it has an issue. If I snap the bolt back a little harder, it WILL kick out the shells, however, neither of my other 2 rim fires have a problem with this. (Savage 93R & Ruger 77/22 LR.) So, maybe it's just a CZ thing? I don't know. Last weekend, we went shooting, and now it is light striking and no striking. It almost got the Golf Club Throw! So I spent the rest of the weekend on Rimfire Central discussing the problem. A replacement spring from J7P Custom Products aaas recommended, and I now have it ready to go into the gun for today. My other issue with the thing last weekend was that the scope fell off. Turns out I was sold the wrong rings, 3/8" instead of 11MM, so they couldn't tighten up enough to stay on. I have fixed that by ordering a set of Bushnell Signature series 22 Rings in High. Also regarding the scope, (A BSA Contender, 4-16X40), was that I was having extreme difficulty seeing through it. The eye relief seemed way to much, making me sit way too far back on the gun. The scope was pushed as far foreword as it could go. Turns out there that the higher the power, the more difficult getting the sight picture through it is. I'm still learning about scopes, LOL. So for today, if the weather is decent, it's back on with the wrong rings, and the new spring. The right rings will come in sometime next week. At least I can test for function today. Just thought I'd share, since this IS the CZ forum. Admins, how about splitting this category into Centerfire and Rimfire subcategories?