Nickle cases anyone reload them?

I have reloaded them for 300 WM, 300 WSM and 270 WSM all without issue. I have heard many people say they will reload them once or twice and them dump them. I carefully inspect all my cases (brass or nickel) after cleaning and before resizing. With the nickel cases I look for any nickel flaking or other damage. I have cases currently that I've reloaded now 3x's for the 300 WSM with no issues.
Just my 2 cents.
Does a nickel case generally anneal the same as a brass case?
 
I actually tried them in a benchrest quality rifle....same prep, same everything, I don't have the answer to how but they shot basically the same quarter inch group but they were 4 inches to the left of the normal brass cases, I have no answer as to to how and why it happened..
 
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