These reamers are produced from premium M-42 tool steel and are individually hand-stoned to cut smooth and chatter free. Made to SAAMI Specifications for standardized cartridges and to the current industry standard for popular wildcat cartridges. They feature a solid pilot and a 3/8" square drive shank for use with a tap wrench. Right hand cut.
Base diameter .244
Neck diameter .243
Angle to rifling from mouth 15 degrees
Rim diameter .302
Rim thickness .043
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