I have had my 15-22 for a few months now, and have found it eats any ammo I have fed it with no problems. due to the shortage of 22 ammo in my area I could only find the Winchester sub sonic and bought a brick. I searched this forum to see if I just wasted my money on some ammo that wont function in the 15-22....any one use this stuff...I cant get to the range for a couple weeks to try it, but this was all that was available.