You need a bigger gun... 12 gauge, modified choke, #4 hipower pheasant loads will do the job. You will need to lead them. Get some practice on clays to learn deflection shooting and you will be knocking them down. Crows are as tough as pheasants so you have to hit them solid.
From 1956-58, "the letter series" of Tula SKSs were produced. They do not have a star on top of the receiver cover but have a small star after the serial number on the side of the receiver. They also have a Cyrillic letter Д, И or К following the serial number. Info on...
All matching numbers with laminated stock, bayonet. Cyrillic markings on receiver indicated 1957 production. I bought in the box, stored in cosmoline in the mid 1990's along with several other SKS's that I later sold. Never fired this one, but I did refinish the stock as I never liked the Soviet...
Great thread here guys ! the number 1 thing that makes me pass on even looking at a firearm for sale is for the seller to tell me how RARE it is. that tells me that it is over priced and the seller is a Dumb A$$.