gamestalker
member
So I replaced the riveted extractor and some of the brass extracts, while others won't, well not very reliably.
Here is what I've discovered. The head on 7mm RM is supposed to be .532". I randomly selected 30 pieces of brass that has been reloaded at least 6-8 times, the heads range from .523" - .529", but none are at .532. Those that are smaller than .526" extract unreliably, the larger one's all extract 100% reliably time after time.
So my first question is why did the case heads shrink, or is this a common variance with 7 mag case head?
The brass I used for this test is mixed, some Fed, Win, RP, and Frontier. BTW, the Fed nickel is all consistently smaller, mostly .523" and none larger than .525".
Further more, my older 700 doesn't have a problem extracting the smaller case heads. I'm stumped and open to any thoughts as to what the problem is.
Has anyone else ever experienced this problem?
GS
Here is what I've discovered. The head on 7mm RM is supposed to be .532". I randomly selected 30 pieces of brass that has been reloaded at least 6-8 times, the heads range from .523" - .529", but none are at .532. Those that are smaller than .526" extract unreliably, the larger one's all extract 100% reliably time after time.
So my first question is why did the case heads shrink, or is this a common variance with 7 mag case head?
The brass I used for this test is mixed, some Fed, Win, RP, and Frontier. BTW, the Fed nickel is all consistently smaller, mostly .523" and none larger than .525".
Further more, my older 700 doesn't have a problem extracting the smaller case heads. I'm stumped and open to any thoughts as to what the problem is.
Has anyone else ever experienced this problem?
GS