Brownells Brownells Brownells 75th Anniversary - A Shooting Heritage

Absolutely Essential For Accurate, Safe, Chamber Work

The only way to accurately measure and test the length of the chamber of the rifle. Essential when chambering a new barrel to ensure a tight, accurate, safe chamber. Whenever you buy a used gun, always check the headspace before firing. Gauges are etched with “Go” or “No-Go” and caliber/gauge name for easy identification. Both Forster and Clymer gauges are made to SAAMI specs.


AR-15, Issue:10, Page:082
Big Book Catalog, Issue:68, Page:088
Big Book Catalog, Issue:68, Page:495
Law Enforcement / Police Store, Issue:08, Page:054
New Product Supplement, Issue:611, Page:017

SPECS: Machined Steel. Size varies with caliber and gauge style. NOTE: Gauges Interchangeable between calibers have same Stock #. .30/30 Cartridges are .219 Wasp, .219 Zipper, .22 Sav HP, .30-30, .32 Win Spl, .32-40, .375 Win and .38-55. .30/06 Cartridges are .25-06, 6.5mm-06, .270 Win, .30-06, 8mm-06, .338-06 and .35 Whelen. Magnum Cartridges are .257 Weatherby, .264 Win, 6.5 Rem Mag, .270 Weatherby, .275 H&H, 7mm Rem Mag, 7mm Weatherby, 7x61 S&H, .300 H&H, .300 Win Mag, .30-338, .300 Weatherby, .308 Norma, 8mm Mag, .338 Win, .340 Weatherby, .350 Rem Mag, .357 Norma, .375 H&H, .416 Rem Mag and .458 Win.

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36 Item(s)
300 GO REM ULTRA MAG HEADSPACE GAUGE
184-100-306WB
GO, .300 Ultra Mag, .300 Ultra
184100306GO, .300 Ultra Mag, .300 Ultra

Mfr Part: GO300UM

$29.00

In Stock

Cartridge: 300 Remington Ultra Magnum

Style: Go Gauge

22LR, 17HM2, 17HS GO CLYMER HS GAUGE
184-100-220WB
GO, .17 HM2 & .17HS, .22LR; Bentz, .22RF
184100220GO, .17 HM2 & .17HS, .22LR; Bentz, .22RF

Mfr Part: GO22LR

$30.00

In Stock

Cartridge: 22 Long Rifle

Style: Go Gauge

.204 RUGER GO HEADSPACE GAUGE.
184-000-033WB
GO, .204 Ruger
184000033GO, .204 Ruger

Mfr Part: GO204RUGER

$29.00

In Stock

Cartridge: 204 Ruger

Style: Go Gauge

22RFM, 17HMR GO CLYMER HS GAUGE
184-100-230WB
GO, .22 Rimfire Mag, .22RFM
184100230GO, .22 Rimfire Mag, .22RFM

Mfr Part: G022WRFM

$30.00

In Stock

Cartridge: 22 WMR, 22 WRF

Style: Go Gauge

.22 HORNET GO HEADSPACE GAUGE
184-100-235WB
GO, .22 Hornet
184100235GO, .22 Hornet

Mfr Part: G022H0R

$30.00

In Stock

Cartridge: 22 Hornet

Style: Go Gauge

30/30 GO CLYMER HEADSPACE GAUGE
184-100-300WB
GO, .30/30 see Specs for Cartridges
184100300GO, .30/30 see Specs for Cartridges

Mfr Part: G03030WCF

$30.00

In Stock

Cartridge: 30-30 Winchester

Style: Go Gauge

.221 FIREBALL GO CLYMER HEADSPACE GA.
184-100-218WB
GO, .221 Fireball, .221 Rem
184100218GO, .221 Fireball, .221 Rem

Mfr Part: G0221REM

$29.00

In Stock

Cartridge: 221 Remington Fireball

Style: Go Gauge

223 REM GO CLYMER HEADSPACE GAUGE
184-100-240WB
GO, .223 Rem
184100240GO, .223 Rem

Mfr Part: G0223REM

$29.00

In Stock

Cartridge: 223 Remington

Style: Go Gauge

5.56 NATO GO HEADSPACE GAUGE
184-000-035WB
GO, 5.56 NATO
184000035GO, 5.56 NATO

Mfr Part: GO556NATO

$33.00

In Stock

Cartridge: 5.56 mm NATO

Style: Go Gauge

22 REM BR/6MM REM BR/7MM BR GO HS GA
184-100-222WB
GO, .22 Rem BR, 6mm BR, 7mm BR
184100222GO, .22 Rem BR, 6mm BR, 7mm BR

Mfr Part: G0BR

$29.00

In Stock

Cartridge: 6 mm BR Norma, 7 mm BR (Benchrest) Remington

Style: Go Gauge

22/250 GO CLYMER HEADSPACE GAUGE
184-100-250WB
GO, .22-250
184100250GO, .22-250

Mfr Part: G022250

$29.00

In Stock

Cartridge: 22-250 Remington

Style: Go Gauge

308 WIN. GO CLYMER HEADSPACE GAUGE
184-100-260WB
GO, .243 Win, .308 Win; .358 Win
184100260GO, .243 Win, .308 Win; .358 Win

Mfr Part: G0308WIN

$29.00

In Stock

Cartridge: 243 Winchester, 308 Winchester, 358 Winchester

Style: Go Gauge

6MM REM GO CLYMER HEADSPACE GAUGE
184-100-270WB
GO, 6mm Rem
184100270GO, 6mm Rem

Mfr Part: G06MMREM

$25.99 $29.00

In Stock

Cartridge: 6 mm Remington

Style: Go Gauge

.32-20 GO CLYMER H'SPACE GAUGE
184-100-360WB
GO, .25-20, 32-20
184100360GO, .25-20, 32-20

Mfr Part: GO2520

$30.00

In Stock

Style: Go Gauge

250 SAVAGE GO HEADSPACE GAUGE
184-100-255WB
GO, .250 Savage
184100255GO, .250 Savage

Mfr Part: G0250SAV

$29.00

In Stock

Cartridge: 250 Savage

Style: Go Gauge

30-06 GO CLYMER HEADSPACE GAUGE
184-100-310WB
GO, .30-06 See Specs for Cartridges
184100310GO, .30-06 See Specs for Cartridges

Mfr Part: G03006SPR

$29.00

In Stock

Cartridge: 30-06 Springfield

Style: Go Gauge

MAGNUM GO CLYMER HEADSPACE GAUGE
184-100-320WB
GO, Magnum See Specs for Cartridges
184100320GO, Magnum See Specs for Cartridges

Mfr Part: G0BLT

$30.00

In Stock

Style: Go Gauge

6.5X55 GO CLYMER HEADSPACE GAUGE
184-100-290WB
GO, 6.5x55
184100290GO, 6.5x55

Mfr Part: G06555

$29.00

In Stock

Cartridge: 6.5 x 55 mm Swedish Mauser

Style: Go Gauge

7X57 GO CLYMER HEADSPACE GAUGE
184-100-280WB
GO, .257 Roberts; 7x57
184100280GO, .257 Roberts; 7x57

Mfr Part: GO7X57

$29.00

In Stock

Cartridge: 7 mm Mauser (7 x 57 mm Mauser)

Style: Go Gauge

284 WIN GO CLYMER HEADSPACE GAUGE
184-100-287WB
GO, .284 Win
184100287GO, .284 Win

Mfr Part: GO284WIN

$29.00

In Stock

Cartridge: 284 Winchester

Style: Go Gauge

M-1 CARBINE GO HEADSPACE GAUGE
184-100-350WB
GO, .30M1, .30 Carb
184100350GO, .30M1, .30 Carb

Mfr Part: G030M1CARB

$30.00

In Stock

Cartridge: 30 Carbine

Style: Go Gauge

30/40 KRAG/303 BRITISH GO HS GAUGE
184-100-302WB
GO, .30-40 Krag; .303 British
184100302GO, .30-40 Krag; .303 British

Mfr Part: GO3040KRAG

$30.00

In Stock

Cartridge: 303 British, 30-40 Krag

Style: Go Gauge

CLYMER 300 WIN SHORT MAG GO HS GAUGE
184-100-263WB
GO, .300 Win Short Mag
184100263GO, .300 Win Short Mag

Mfr Part: GO300WSM

$29.00

In Stock

Cartridge: 270 WSM (Winchester Short Mag), 300 WSM (Winchester Short Mag), 325 WSM (Winchester Short Mag), 338 Winchester Magnum

Style: Go Gauge

7.62 X 39 GO CLYMER RIMLESS H'SPACE GA
184-100-490WB
GO, 7.62x39 Russian Rimless
184100490GO, 7.62x39 Russian Rimless

Mfr Part: G076239

$29.00

In Stock

Cartridge: 7.62 x 39 mm Russian

Style: Go Gauge

7.62X54R RUSSIAN GO CLYMER HS GAUGE
184-100-500WB
GO, 7.62x54R Russian
184100500GO, 7.62x54R Russian

Mfr Part: G076254R

$30.00

In Stock

Cartridge: 7.62 x 54 mm Russian

Style: Go Gauge

45/70 GO CLYMER HEADSPACE GAUGE
184-100-330WB
GO, .33 Win, .348 Win, .40-65, .45-70 Govt
184100330GO, .33 Win, .348 Win, .40-65, .45-70 Govt

Mfr Part: G04570GOVT

$30.00

In Stock

Cartridge: 33 WCF, 348 Winchester, 40-65 Winchester, 45-70 Government

Style: Go Gauge

38 SUPER NONTE GO CLYMER HS GAUGE
184-100-390WB
GO, .38 Super (Nonte)
184100390GO, .38 Super (Nonte)

Mfr Part: G038SUPN

$30.00

In Stock

Cartridge: 38 Super

Style: Go Gauge

.357/.38 GO CLYMER H'SPACE GAUGE
184-100-380WB
GO, .38 Spec, .357 Mag, .357 Max
184100380GO, .38 Spec, .357 Mag, .357 Max

Mfr Part: G0357MGN

$30.00

In Stock

Cartridge: 357 Magnum, 38 Special

Style: Go Gauge

40 S&W GO CLYMER HEADSPACE GAUGE
184-100-400WB
GO, .40 S&W
184100400GO, .40 S&W

Mfr Part: G040SW

$30.00

In Stock

Cartridge: 40 S&W

Style: Go Gauge

44 SPL/MAG HEADSPACE GAUGE GO
184-100-430WB
GO, .44 Mag/.44 Spc
184100430GO, .44 Mag/.44 Spc

Mfr Part: GO44MGN

$30.00

In Stock

Cartridge: 44 Magnum, 44 Special

Style: Go Gauge

45 ACP GO CLYMER HEADSPACE GAUGE
184-100-450WB
GO, .45 ACP
184100450GO, .45 ACP

Mfr Part: G045ACP

$30.00

In Stock

Cartridge: 45 Auto (ACP)

Style: Go Gauge

.45 COLT GO CLYMER H'SPACE GAUGE
184-100-510WB
GO, .45 Colt
184100510GO, .45 Colt

Mfr Part: G045LC

$30.00

In Stock

Cartridge: 45 (Long) Colt

Style: Go Gauge

410 GA. GO CLYMER SHOTGUN H'SPACE GA
184-110-410WB
GO, .410 Shotgun
184110410GO, .410 Shotgun

Mfr Part: G0410

$45.00

In Stock

Cartridge: .410 Bore

Style: Go Gauge

20 GA. GO CLYMER SHOTGUN H'SPACE GA
184-110-200WB
GO, 20 Gauge
184110200GO, 20 Gauge

Mfr Part: G020

$45.00

In Stock

Cartridge: 20 Gauge

Style: Go Gauge

12 GA. GO CLYMER SHOTGUN H'SPACE GAUGE
184-110-120WB
GO, 12 Gauge
184110120GO, 12 Gauge

Mfr Part: G012

$45.00

In Stock

Cartridge: 12 Gauge

Style: Go Gauge

300 BLACKOUT HEADSPACE GAUGE GO
100-011-283WB
GO, 300 Blackout Headspace Gauge
100011283GO, 300 Blackout Headspace Gauge

Mfr Part: GO300BLACK

$29.00

In Stock

Cartridge: 300 AAC Blackout

Style: Go Gauge

CLYMER HEADSPACE GAUGES - GO