I too have PERSONALLY experienced OSR on my rifle..., A brand spanking new Weatherby MK V in .378. The culprit? Barnes X. The Hornady Interlocks shot fine and I got it sighted in with them. Back home for a cleaning. Barrel wiped and polished with a soft oily cloth, nice and shiny beautiful deep blueing removing the unsightly finger prints from the surface.

Then to the range with a fist full of 300 grain Barnes X..... back home for another cleaning and voila! Lovely spirals matching the rifling clearly visible in the blueing on the entire outside length of the barrel starting from just ahead of the chamber. I wish they had come up with the stress relief grooved bore rider design BEFORE I pooched a beautiful rifle with this original Barnes X. I would still own that rifle had it not been destroyed like that.

Believe it or not.

OSR DOES exist as a very real phenomena. I just recently raised an eyebrow in another recent post when I found a Woodleigh Hydro that had both riveted and bent after having hit a hippo broadside shoulder shot, the bullet taking a sharp right hand turn and somehow ending up in the neck. The hippo expired (obviously since I was able to recover the bullet!), but I think that with both stress relief grooves and the somewhat softer alloy of the Hydro, I am confident in shooting them in modern doubles without complete fear of OSR, although to be honest, I sure do spend a great deal of time looking for OSR to see if I’ve managed to damage a fine double..... so far, so good. Whether a riveted bent Hydro causes me calamity via angry big biting stomping animal violence is the opposite side of the hard/soft equation, but I believe this was an anomaly under extenuating circumstance and I tend to think the Woodleigh people have struck a reasonable balance with their alloy and grooved design.