I have owned Marlin, Ruger, and Cooper rifles in 17mach2, and friends own CZ and Savage rifles. The odd used one shows up for sale, but I haven't seen a new one in years. Ammunition is still being produced, but you need to keep a fair amount on hand to get you from one run to another.
Apparently CCI/Hornady is doing two production runs per year. They must have just done one, as it is everywhere here at the shops in YYC. I sold all my 17M2 stuff a few years ago, 717, 917. Wish I had kept one now as ammunition appears to be not going away.
The 717, I never had a problem with mine, but kept that chamber spotless as recommended by others to prevent an out of battery situation. The 917, a VS stainless laminate, was more accurate, but not by much.
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