I'd have to agree that it sounds as though you short stroked it. Now on the Ruger, I have two, a m77MKII and a Hawkeye, essentially the same gun just that the Hawkeye has some cosmetic differences and the new LC6 trigger. I love my mauser actions. The main differences with the Hawkeye over the standard MKII is they have a slightly thinner profile on the barrel, slightly thinner profile on the fore end of the stock and instead of having the highly polished finish it's a matte finish. I don't think you can go wrong but if you short stroking it having a CRPF wouldn't resolve the issue for you. You still need to pull the bolt back far enough for the ejector to contact the case. The advantage is that if your at an odd angle the extractor will guide the next round into the chamber by the rim being under the extractor preventing it from falling out of the action.