.220 Swift 21 deg. Bump Gage

.220 Swift 21 deg. Bump Gage
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  • Item #: 749 011 471
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Price $9.95

Sinclair 21 Degree Bump Gage for .220 Swift.  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.