You get one of these Lee Case Trimmers (Cutter & Lock Stud):
https://www.reloaders.co.nz/shop/Rel...tud+90110.html
and then a gauge and shellholder for your cartridge (45-70):
https://www.reloaders.co.nz/shop/Rel...ent+90152.html
and then finally you need a inside/outside deburr tool just to clean up the burrs on each case after trimming:
https://www.reloaders.co.nz/shop/Rel...ring+Tool.html
Max case length for 45-70 is 2.105” so has a trim length of 2.095” (you can technically then reload until they reach 2.105” again. However, for consistency lots of people just trim every case everytime.
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