As others have voiced, "30WCF" and .30-30 Win are indeed the same cartridge. My understanding (e.g., from what I've read and been told by old-timers) a bit of a ruckus came up when Remington Arms took pretty much identical to Winchester's cartridges and produced them with their rims milled off, starting in 1906... They had the 25, 30, 32, and 35, and surely did not wish to have the "Winchester" name following these. Hence, as one example, there was the .30-30 Remington -- made for semi-automatic firearms such as their Model 8, 14, 81, and others. (Interestingly, both bullet size/weight and powder charges for these cartridges -- either the xx Remington or xx-WCF -- are the same).
There was a bit of confusion, too, when one wished to buy .30-30 / .30wcf cartridges which were manufactured by Remington Arms
. I inserted here a couple of photos of the rimless .30-30 Remington.
Congrats, big-time, on your getting a "thutty-thutty" as I've also heard them called...
geo