I have owned numerous Ruger 77s with walnut stocks ranging from 223 through 375 Ruger. I still have several but just noticed that only one of them has recoil cross bolt. It happens to be on 77 MKII in 308. It looks factory but I can't say that I have ever seen a recoil cross bolt on another short action 77. My neighbor has a 338 Win mag and it doesn't have a recoil cross bolt in it's stock. My brothers H&H does have one. What's the deal? Anyone know?