you did real good there! You can tell the date of manufacture by the serial number. The letter at the beginning of the number is the date code.
In my 30-30 lever guns, my money load is 34.5 grains of IMR4320 pushing a Speer 170 grain FP. Depending on which rifle it is, I get between 1900, and 2200 fps. Accuracy is MOA.
