I am looking for a scope for my CZ550 in 375H&H. I have seen a second hand Leupold M7 3x. Does anyone know what they are like.I know they are an older scope. Is it suitable, both in ruggedness and quality for this calibre? Am I restricting myself too much with the 3x. The positive is it's much cheeper than a VX11 1-4. which retails around $470AUS new. The M7 is about $180.