SINCLAIR INTERNATIONAL SINCLAIR BUMP GAGE INSERT | Sinclair Intl

Sinclair Bump Gage Inserts are used to measure the amount of shoulder bump when setting up full length sizing dies. Our Bump Gages install in either of our comparator bodies and are machined to fit particular shoulder angles of cartridges. Rather than measuring to the datum line, these gages indicate off of the shoulder of the case to get a better, more easily assessable measurement of how much you are actually sizing your cases. We usually recommend between .001" to .002" bump for bolt action rifles and between .003" and .005" for AR-15 type rifles. Also a useful tool for keeping your brass and loaded ammunition separated if you have multiple rifles chambered for the same cartridge and checking loaded ammunition.


Big Book Catalog, Issue:68, Page:531
Big Book Catalog, Issue:68, Page:532
Sinclair, Issue:5B, Page:027
Sinclair, Issue:5B, Page:034
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Cartridge: 25-06 Remington, 270 Winchester, 280 Remington, 30-06 Springfield, 7.62 x 39 mm

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Cartridge: 243 Winchester, 260 Remington, 7 mm - 08 Remington, 7 x 64 mm Brenneke, 307 Winchester, 308 Marlin Express, ...

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Cartridge: 338 Federal, 338 Lapua Mag

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Cartridge: 220 Swift

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Cartridge: 17 Remington, 221 Remington Fireball, 222 Remington, 222 Remington Mag, 223 Remington, 5.56 mm NATO

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Cartridge: 6.8 mm Remington SPC, 300 AAC Blackout

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Cartridge: 264 Winchester Magnum, 17 Hornet, 225 Winchester, 6.5 x 55 mm Swedish Mauser, 7 mm Remington Magnum, 7 mm STW, ...

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Cartridge: 6 mm Remington, 250 Savage

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Cartridge: 27 Nosler, 26 Nosler, 270 WSM (Winchester Short Mag), 284 Winchester, 7 mm WSM (Winchester Short Magnum), 30 Nosler, ...

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Cartridge: 22-250 Remington, 223 WSSM (Winchester Super Short Mag), 243 WSSM (Winchester Super Short Mag)

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Cartridge: 20 Nosler, 6 mm BRX, 20 BR (Benchrest), 20 PPC, 20 Tactical, 20 Vartarg, ...

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Cartridge: 300 Remington SAUM, 25 WSSM (Winchester Super Short Mag), 6.5 mm BR, 6.5 Grendel, 6.5 Creedmoor, 30 BR (Benchrest), ...

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Cartridge: 22-250 Ackley Improved, 22-6mm Remington Ackley Improved, 22/30-30 Ackley Improved, 220 Ackley Improved, 223 Ackley Improved, 228 Ackley Magnum, ...

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Cartridge: 25 Ackley Krag Short Improved, 25-3000 Ackley Improved, 257 Roberts +P Ackley Improved, 257 Roberts Ackley Improved, 338-06 Ackley Improved, 257 Ackley, ...

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Caliber: Universal