Hello, per post in lever gun section I am looking at my options to shoot cast from a Marlin 1895 SS 45-70 with a Micro Groove barrel. I slugged the barrel and came up with .459" to .460" this points me to .462" cast boolits. I will have to get a custom mold and custom lubesizer. The potential issue is once I get the cartridge squared away it may not chamber correctly do the the the larger cast boolits which may make the crimping area to big or not fit the throat correctly.
How hard is it to relive the chamber throat area +.002" if needed and/or where needed to handle the .462" boolit ?
Cuirous if anyone has any ideas or ran into this situation on a Marlin 45-70