I have 3x fired 300 WM Winchester brass that I have loaded and fired in my Remington 700 Sendero SFII. I use a Redding competition full body die when prepping the brass. I recently purchased a used Rbros 300WM. My question is, should I get unfired Winchester brass and shoot/fire form for the Rbros rifle or can I just use the brass I used in my Sendero. The one thing I would check is the shoulder bump when prepping the brass for the Rbros vs the Sendero. Is there other considerations/concerns of using brass fired in a different rifle?