The reamer holder ensures parallelism with the bore and compensates for misalignment up to .030" between tailstock and chuck.
Constructed with a wide bearing surface and hardened, ground components for smooth movement without cam-to-center lockup.
Features a low mass aluminum head for quick response to out of roundness and a hardened steel bushing to prevent reamer socket wear.
CERROSAFE alloy shrinks initially then expands to exact chamber size after an hour, and further expands by .0025" after 200 hours, which is considered by toolmakers.
The alloy melts at 158° - 190° F and should be melted in a clean iron ladle, poured once fully melted, and removed from the chamber when it cools to room temperature.
Before casting, the rifle chamber must be clean and the bore plugged near the throat; the alloy should be poured through a tube and the barrel warmed if cold.