I've been given 1500 Rd's of Winchester Western .22 LR Target ammo. It is the older Western Ammo Box. These are bricks of 500 each. I guess tamate they are from the late 50's to mid 60's. All the rounds I've checked are in good shape no outer corrosion, some lead heads with a little oxidation on them but rubs off. Beings they are target ammo I believe it a 25 Yard bullet. Was thinking of using them on ground squirrels distance 25-40 Yard's. Looking for input on this. Thanks