Hello,
Both the round barrel .22 Short or .22 Long Rifle are found with Grooved receivers up to 1957 based on the rifles I have seen in my survey. The >22 Long Rifle Shot only had the same receiver. And the .22Mag is obviously a single caliber and all had grooved receivers.
Michael
Model 1892 / Model 61 Collector, Research, Valuation
January 26, 2011

Interesting Michael, according to Schwings book the single calibers barrels were discontinued ’47 short, ’49 long rifle, and ’50 WRF. The grooved receivers supposedly showed up in ’54. Obviously we don’t know how long these single caliber barrels were still available at the factory……..maybe many years later. This is why I questioned the overlap earlier. The surveys of actual specimens tend to give us much more information to add to what all of our reference books show. Its probably safe to say single caliber grooved receiver guns are not going to be abundant (except for the magnums of course).
~Gary~
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