I'm trying to find out if it is possible to rechamber a 7MM Rem Mag to a 7 STW without having to set the barrel back. What is the magazine length standards on each normally? (not the loaded round OAL). Thanks or your help.
Usually not a problem but there can be situations where the shoulder on the old 7mm Rem Mag chamber will not be completely cleaned up by the STW reamer.
For example, if you have a 7mm Rem Mag chamber that is dimensionally on the outer limits of SAAMI spec and a 7mm STW reamer that is a min spec custom reamer, you may see this problem.
I have only seen it once, it does not happen often but it does happen. If you used a standard spec 7mm STW reamer, I would doubt you would have any problem unless you had a very loose 7mm Rem Mag chamber to start with.
Kirby Allen(50)
Don't you have to mess around with a sako extractor and open up the bolt face to go with the rum?