Value of Ruger M-77 MKII 338 Win Mag Stainless, 24", black synthetic stock
The best I can tell is that the gun is manufactured in 1981. I've enclosed the Ruger Serial number 788-292XX.
I believe what you have is the Ruger M77RP MKII w/ 22" to 24" Stainless Steel Barrel, and Synthetic Stock. It is valued at;
Exc. Cond: $525.00 USD
V.G. Cond: $375.00 USD
Good Cond: $250.00 USD
Hope this helps,
You are most welcomed.... devildocdon. Gotta be a story behind that user name. Are you a Vet?