PTG Headspace Gauge Interchangeability Chart Headspace Gauges Color Coded (Green for Go Gauge, Red for No Go Gauge, Brown for Field Gauge) Gauge Compatible with these Calibers Belted .535 Base Belts 244 H&H, 257 WBY Mag , 264 Win Mag, 270 WBY Mag, 275 H&H, 300 H&H, 300 WBY Mag, 300 Win Mag, 308 Norma Mag, 338 Wby Mag, 338 Win Mag, 340 Wby Mag, 350 Rem Mag, 358 Norma Mag, 358 STA, 375 H&H, 375 Super Mashburn Mag, 375 WBY Mag, 357 STW, 400 H&H, 416 RemMag, 416 Taylor, 425 Express, 458 Lott, 458 Win Mag, 7mm Rem Mag, 7mm STW, 7mm Mashburn Super Mag, 7mm Practical,7mm Wby Mag 8mm Rem Mag NOTE WBY ONLY HAS .004. FROM MIN TO MAX. THE NO GO IS .001 SHORTER THEN STD. NO GO, AND THERE IS NO FIELD. Most Of The Ackley Improved Mags .17 HMR 14 RF Magnum, 17 RF Match, 22 WRF Short Body, (Hornady Magnum Rimfire) 22WMR Short Bodys .17 HM2 17 Mach II, 17 RF Aguila, 17 PMC, 17 High Standard .22 LR RF 22 Bentz, 22 LR Match, 22 Lilja Match, 22 RF, 22 Freeland Magnum .22 Hornet (Rimmed Only) Rimmed Hornet Based Wildcats (17 &22 are different shoulder angles) .22 K-Hornet(Rimmed Only) 17 K-Hornet, 20 K-Hornet .220 Weatherby 22 Weatherby Rocket .222 Remington Mag 6 x 47 Remington 17-223, 17 Practical, 20 Practical, 223 Wylde, 5.56 .223 Remington NATO, 5.56 x 45mm, 6 x 45mm, .25-45 Sharps .223 WSSM 243 WSSM (Winchester Super Short Mag) NOTE: 25 WSSM is different .225 Winchester 17-225 Win, 270-225 Win 6.5-225 Win, 6.5-225 Win, 7- 225 Win .250 Savage 250-3000 Savage, 270 Savage, 6mm-250 Savage, 6.5mm-250 Savage, 7mm-250 Savage 28 Nosler .26 Nosler Note This is the only two Nosler’s that are interchangeable .270 Gibbs 240 Gibbs, 6mm/06 Gibbs, 25 Gibbs, 25 Gibbs, 30 Gibbs, 35 Gibbs, 6.5 Gibbs, 7mm Gibbs 6mm-284 Win, 6.5mm-284 Win, 22-284 Win, 25-284 .284 Winchester Win, 30-284 Win, 35-284 Win, 270-284 Win, 338-284 Win, 284 Shehane, 284 Lapua, 284 Norma .300 AAC Blackout 17/221 Remington, 221 Remington Fireball, 300 TIW, 300 Whisper, 30-221, 300-221, 6.5mm Fireball .30 IHMSA 6mm IHMSA, 7mm IHMSA, IHMSA Wildcats .30 Remington 32 Remington .300 RSAUM .25-300 RSAUM (Remington Short Action Ultra Magnum), (Remington Short Action Ultra Mag) .270-300 RSAUM (Remington Short Action Ultra Magnum), .338-300 RSAUM (Remington Short Action Ultra Magnum), 6mm-300 RSAUM (Remington Short Action Ultra Magnum), 6.5mm-300 RSAUM (Remington Short Action Ultra Magnum), 7mm RSAUM (Remington Short Action Ultra Magnum), 6.5mm GAP (GA Precision) 4S .300 RUM 338 Edge, 270 RUM ,358 RUM, 375 RUM, 458 RUM, (Remington Ultra Mag) 7mm RUM, 8mm RUM NOTE: 338 RUM is different .300 WSM 270 WSM, 325 WSM (Winchester Short Mag) NOTE: 7mm WSM & 17 WSM are different. .30-06 Springfield 6.5mm-06 / 6.5mm-06 A-Square, 22-06 / 223-06, 25-06 Remington, 243-06 / 6mm-06, 270-06 / 270 Winchester, 303-06 Springfield, 338-06 / 338-06 A- Square, 35 Whelen, 375 Whelen, 7mm-06, 8mm-06 Springfield, .30-30 WCF (Rimmed) 303 Savage, 219 Zipper, 219 Zipper Imp, 219 Donaldson (Winchester Center Fire) Wasp, 25-35 WCF, 32-40 WCF, 30-30 WCF(CIP), 38-55 WCF, 30 Herrett, 32 Winchester Special, 356 Winchester, 357 Herrett, 375 Winchester, 375 Super Mag, 307 Winchester, 6mm-30x30, 7mm-30 Waters, 7mm-30 Waters (CIP), 7mm International R .30-40 Krag 303 British, 303 EPPS, 40-70 Straight 22 - 243 Win, 243 Win, 260 Rem, 270 - 08, 270 – 308 Win, .308 Winchester 338 Federal, 338 Federal CIP, 338 - 08, 338 - 358 Win, 358 Win, 6.5mm Panther, 6.5mm - 08, 7mm - 08 Rem, 7mm – 308 Win, 7.62mm NATO, 7.62mm x51 .32 H&R Mag 32H&R (Harrington and Richardson) Magnum, 32 S&W (Harrington and Richardson) (Smith and Wesson) Long, 32 LC (Long Colt) / .32 Colt .32-20 WCF (Rimmed) 218 Bee, 218 Mashburn Bee, 25-20 WCF, 17 Ackley Bee, (Winchester Center Fire) 17 HeeBee 2 .338 Norma Mag 300 Norma Mag 357 Mag 22 Rem Jet, 256 Win Mag, 357 Max, 38 S&W, 38 Special 378 Weatherby 30-378 Wby, 338-378 Wby, 416 Wby, 460 Wby 416 Rigby 450 Rigby 44 Rem. Magnum 44 S&W (includes Russian, American) , 45 S&W, 45 S&W Schofield, 44 Special, 45 Colt, .45 Long Colt, 454 Casull CIP, 445 Super Mag, 460 S&W Mag Max rim thickness may vary. 44-40 WCF 38-40 WCF (Winchester Center Fire) 348 Winchester, 50-90 Sharps (50 2-1/2"), 40-65 WCF (Winchester Center Fire), 40-82 Winchester, 45 Basic, 45-60 Winchester, 45-90 45-70 Government Sharps (45 2-4/10"), 45-110 Sharps (45 2-7/8"), 45-120 Sharps (45 3-1/4"), 450 Alaskan, 50 Alaskan, 50-70 Government, 50-110 WCF (Winchester Center Fire), 50-140 Sharps (50 3-1/4") 6mm Beggs 22 Beggs, 220 Beggs, 30 Beggs 6 mm BR (Bench Rest) 17 BR (Bench Rest) 20 BR (Bench Rest), 7mm BR (Bench Rest), 6.5mm BR (Bench Rest), 6mm BR (Bench Rest), .338 BR (Bench Rest), .30 BR (Bench Rest), .270 BR (Bench Rest), .25 BR (Bench Rest), .22 BR (Bench Rest) 6mm BRX 30 BRX, 6mm BRX, 6.5mm BRX 6mm Dasher 20 Dasher, 30 Dasher, 6mm Dasher, 7mm Dasher, all Dasher Norma’s and Dasher Lapua’s 6mm PPC 30 PPC, .22 PPC, 6.5mm PPC, 7mm PPC, All PPC (Palmisano Pindell Cartridge) Cartridges, SAKO, USA, Europe 6mm Remington .244 Remington , 22TH (Texas Trophy Hunter), .22-244 Remington, .224 TTH (Texas Trophy Hunter 6mm Super LR 6mm SLR, 6.5mm SLR, .243 SLR 6mm XC 22 XC, 30 XC, All David Tubs XC Cartridges 6.17mm Lazzeroni Spitfire 6.71 Lazzeroni Phantom 6.5mm Creedmoor 6mm Creedmoor, 7mm Creedmoor, 30 Creedmoor, 338 Creedmoor 6.5 Grendel 264 LBC-AR, 6mm Grendel, 6mm BPC, 6.5 BPC 3 6.5 x 47mm Lapua 6 x 47 Lapua, 20 x 47 Lapua, 22 x 47 Lapua, 30 x 47 Lapua 6.53mm Lazzeroni Scramjet 6.17 Lazzeroni Flash 6.8 mm Remington SPC 6.8 mm Remington SPC II 7mm TCU 6mm TCU (Thompson/Center Ugalde), 6.5mm TCU,.25 TCU , 270 Ugalde 7.21mm Lazzeroni Firehawk 6.71 Lazzeroni Blackbird 7.62 x39 SAAMI & CIP Headspace Gauges are NOT 7.62mm x 39mm Compatible with each other 7.82mm Lazzeroni Patriot 7.21 Lazzeroni Tomahawk, 8.59 Lazzeroni Galaxy 7.82mm Lazzeroni Warbird 7.21 Lazzeroni Firebird , 7.62 Lazzeroni Firebird, 8.59 Lazzeroni Titan, 10.57 Lazzeroni Meteor To the best of our knowledge, the information contained herein is accurate and reliable as of the date of publication; however, we do not assume any liability whatsoever for the accuracy and completeness of the above information. Please defer all firearms work to a qualified gunsmith. 4 .