TwoMore
Well-Known Member
if you dont know your chamber length that would be hard to answer, that is a critical measurement , I make my own gauges but most of my rifles are tighter necks. You need to know what your chamber length is , then you will know if you need to trim or not. I would imagine that the chamber is the same as a 7 stw if i remember right my stw is 2.840 trim. but like I said thats a critical measurement
www.youtube.com/watch?v=JKnXJxaAw2U
edit : I re read your post and I think you are talking about the case neck junction. when i neck down it looks the same as yours and when I fire form they form to the chamber
www.youtube.com/watch?v=JKnXJxaAw2U
edit : I re read your post and I think you are talking about the case neck junction. when i neck down it looks the same as yours and when I fire form they form to the chamber
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