Have a chance to pick up some Spanish surplus 308. It's Santa Barbara 1962 vintage. Question: is this stuff corrosive and I hear that some of it is underpowered. Have also heard good things about SB surplus 308, but it is usually referring to later production years. Can't find much info on the 1962 production. Any info would be appreciated so as to establish price and suitability for use in a CETME.