As far as problems with extraction I have had a Mauser that failed and a pre-64 Winchester that failed. I never had a problem with a 700 for extraction. I own well over 20 700's, a couple Mausers and I am down to two pre-64 70's. The pre-64 70's are 375 H&H AI & 300 H&H. I'm not sure how many Mausers I've had - maybe a dozen??? But I have had a few classic 70's and one other pre-64 70.
I don't understand the idea that having a high pressure round causing a failure is the Manufacturer/model's problem. I know that the failure on the Mauser was my fault. I was a bit younger and didn't know that WW760 and WW760-BR were way different powders.
