04-07-2015, 12:30 PM
Willie, yes the head of the cartridge is protruding 0.008" above the face of the barrel. And yes, technically the original use of the rim on this case is for maintaining proper head space.
My method of sizing the cases uses the shoulder instead of the rim to head space the cartridges at 0.001" to 0.002" from the breech face. Now, the rim on my .218 Bee is used only for extraction and there is indeed a gap ahead of the rim. rd's concern about the head of the cartridge having less than full support is correct but it is only missing full support by 0.008" and since this is the web where the cartridge case wall is strongest it won't cause any problems.
All this typing is making me thirsty!
My method of sizing the cases uses the shoulder instead of the rim to head space the cartridges at 0.001" to 0.002" from the breech face. Now, the rim on my .218 Bee is used only for extraction and there is indeed a gap ahead of the rim. rd's concern about the head of the cartridge having less than full support is correct but it is only missing full support by 0.008" and since this is the web where the cartridge case wall is strongest it won't cause any problems.
All this typing is making me thirsty!
JScott, proud to be a member of MetalworkingFun Forum since Mar 2014.