I have a few boxes of Remington Kleanbore Shorts with a SKU of 4322. My digging so far tells me that these were an “intermediate” velocity post-war load dating from 1946 but are not listed in the 1948 Remington catalog.
The box has two codes applied with what appears to be a rubber stamp. The first stamp is “1042”. The “1” is the longest (in height) digit. The 0 and the 2 are almost but not quite as tall. The 4 is a smaller figure and appears to me to be almost a different font.
The second code is something like “R11E1” but might be two codes stamped one on top of the other. The heights of the numbers vary. My guess is that both sets of stamps were applied with a hand stamper with characters on a series of movable rubber belts.
I got these and several other types of Shorts from a man (since passed away) who was at one time a serious competitor in the ISU/Olympic Rapid Fire Pistol match game. I asked him where I might find shootable quantities of RFP Shorts to test. He said “in my garage”.
My questions are “Is there any story that accompanies this particular load?” and “Was their intended use anything other than plinking?” and “Is this box or the cartridges in it of any particular interest to collectors?”