I just bought a Remington 1902 rolling block rifle chambered in 7mm Mauser on Gunbroker. My collection didn't include RB and by golly it needed one. I have been doing some reading and of course opinions on the net vary widely. Some say the the chambers were cut a little longer than modern ammo specs causing a headspace issue. Some say its not the chamber but flex in the action that can cause stretched cases and possible failure. And of course some say buy factory ammo, go forth and be happy. I'm leaning toward handloading my ammo on the light side. Then you get into using 7mm Mauser brass and neck sizing just enough so the action will close making a false shoulder and fire forming to fit the chamber then after the first time, just neck size. Then there is the school that say about the same but use 270 Win. Brass or even using surplus 30-06 brass. I have plenty of both. I would be interested opinions?