Nice score OE!
That’s a damn early classic stainless.
I believe his is a circa 2000-ish rifle. I don’t think Classic Stainlees M70’s were made in the G30K range (IIRC they started in the 40K’s), but I’m often wrong.
I had two different Classic stainless M70 338 WM’s. None shot all that well, but both were good enough for elk. I cut all mine to 22,” and while I tested different weight bullets up to 250 gr’s, I used 210 NP’s on elk. My best shooting 338 was an early Stainless M700 ADL cut to 22”… that rifle shot like a varmint rifle with everything I fed it.