Even with the lack of 22LR on the market, it seems as though Winchester pulls through with some options. The Super Speed RN is a spicy full size 40 grain, round-nose, copper plated bullet clocking in at 1300 FPS. That’s somewhat faster than even the CCI Mini-Mag featured in our 2014 22 LR Roundup.
Winchester Super Speed RN Accuracy
Accuracy on the Winchester Super Speed was elusive. Most groups were quite large, and average accuracy was the lowest among the high speed rounds. It might work just fine in your rimfire, but it wasn’t so hot in ours.