Sinclair 40 Deg. Bump Gage for Ackley Improved up to 6mm

Sinclair 40 Deg. Bump Gage for Ackley Improved up to 6mm
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  • Item #: 749 011 482
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Price $9.95

Sinclair 40 Deg. Bump Gage for Ackley improed up o 6mm.  Insert used for measuring  the amount of shoulder bump when setting up full length sizing dies.  Bump Gage can be used on the granite bed of our Ultimate Cartridge Check System or with a caliper and one of the Sinclair Bump Gage Bodyies.  Gage machined to fit particular shoulder angle of cartridges. Rather than measuring to the datum line, it indicates off of the shoulder of the case to get a more precise measurement of how much you are actually sizing your cases.  We recommend .001" to .002" bump for bolt action rifles and between .003" and .005" for AR-15 type rifles.