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.
17 - 25-06 Remington, 270 Winchester, 280 Remington, 30-06 Springfield, 7.62 x 39 mm
20 - 243 Winchester, 260 Remington, 7 mm - 08 Remington, 7 x 64 mm Brenneke, 307 Winchester, 308 Marlin Express, 308 Winchester
20A - 338 Federal, 338 Lapua Mag
21 - 220 Swift
23 - 17 Remington, 221 Remington Fireball, 222 Remington, 222 Remington Mag, 223 Remington, 5.56 mm NATO
23A - 6.8 mm Remington SPC
25 - 264 Winchester Magnum, 225 Winchester, 6.5 x 55 mm Swedish Mauser, 7 mm Remington Magnum, 7 mm STW, 30 Remington AR, 300 Winchester Magnum, 8 mm Remington Mag, 338 Winchester Magnum
26A - 6 mm Remington
28 - 22-250 Remington, 223 WSSM (Winchester Super Short Mag), 243 WSSM (Winchester Super Short Mag)
30 - 20 Nosler, 6 mm BRX, 20 BR (Benchrest), 20 PPC, 20 Tactical, 20 Vartarg, 204 Ruger, 22 BR (Benchrest) Remington, 22 BRX, 22 PPC, 22 Nosler, 224 Valkyrie, 6 mm BR, 6 PPC, 6 mm XC, 6mm Creedmoor
30A - 300 Remington SAUM, 25 WSSM (Winchester Super Short Mag), 6.5 mm BR, 6.5 Grendel, 6.5 Creedmoor, 30 BR (Benchrest), 30 Thompson Center, 300 Ruger Compact Magnum, 300 Savage, 338 Ruger Compact Magnum
35 - 27 Nosler, 26 Nosler, 270 WSM (Winchester Short Mag), 284 Winchester, 7 mm WSM (Winchester Short Magnum), 30 Nosler, 300 WSM (Winchester Short Mag), 33 Nosler, 325 WSM (Winchester Short Mag)
40 - 22-250 Ackley Improved, 22-6mm Remington Ackley Improved, 22/30-30 Ackley Improved, 220 Ackley Improved, 223 Ackley Improved, 228 Ackley Magnum, 243 Winchester Ackley Improved, 6mm Ackley Improved, 6mm/30-30 Ackley Improved
40A - 25 Ackley Krag Short Improved, 25-3000 Ackley Improved, 257 Roberts +P Ackley Improved, 257 Roberts Ackley Improved, 338-06 Ackley Improved, 257 Ackley, 260 Ackley Improved, 280 Ackley Improved, 30-30 Ackley
45A – 45 Degree Shoulder up to 30 Caliber
