SAC Modular Comparator Headspace/Bullet Kit

The Modular Headspace Comparator Kit come with the following items

• Short Comparator Body
• Long Comparator Body
• 4 Inserts of your  choice
• Comparator Stand

Each headspace comparator and bullet insert is machined from 17-4 stainless steel.  This material will prevent the inserts from wearing out over time.   What makes these comparators better from competitors kits, is their ability to maintain consistency in your measurement of either headspace or seating depth.  The comparator bodies are machined to give the inserts a little bit of “play” to ensure everything settles in nice when measuring your ammunition.

Our bullet inserts are machined to the bore diameter of the caliber you are reloading for. For example if you choose a .243″ (6mm) caliber bullet insert your bullet insert will have a .237″ bore hole to match the lands of your barrel.  Each bullet insert has a 3° lead machined into the mouth of your bullet insert to match the o-give of commonly used bullets.

PLEASE USE THIS COMPATIBILITY LIST TO DETERMINE WHICH HEADSPACE COMPARATOR IS RIGHT FOR YOU. THE HEADSPACE COMPARATOR MODEL IS LISTED FIRST, THE COMPATIBLE CARTRIDGE IS LISTED AFTER.

204 Ruger

•  204 Ruger

223 Model

•  223 Remington and 5.56mm NATO

•  Wildcat Cartridges necked down from the 223 Remington.

22 Cal x 40°

• 223 Ackley Improved

• 22-250 Ackley Improved

• 22 BRA
• 22 Dasher (Non-Alpha Chamber)

22-250 Remington (22 Cal x 28°)

• 22-250 Remington

• Wildcat Cartridges necked down from the 22-250 Remington.

6mm x 20°

• 243 Winchester

• Wildcat Cartridges necked down from the 243 Winchester

6mm x 30°

• 6mm Creedmoor

• 6XC

• 6 x 47 Lapua

• 6BR

• 6BRX

• 6mm Super LR

• 6 ARC
• 6 PRC

6mm x 35°

• 6GT

• 6mm x 284 Winchester

6mm x 40° .275” Neck, .060” Neck Shoulder Radius

• 6mm Dasher

• 6BRA (6mm BR Ackley Improved)

• 243 Ackley Improved

• Any 6mm Cartridge with 40° Shoulder and a neck smaller than .275”

6mm x 40° 273” Neck, .060” Neck Shoulder Radius

• 6mm Dasher

• 6BRA (6mm BR Ackley Improved)

• 243 Ackley Improved

• Any 6mm Cartridge with 40° Shoulder and a neck smaller than .273”

Alpha 22 Dasher

• Alpha .22 Cal Dasher with an Alpha Legacy Reamed Chamber

Alpha 6mm Dasher

• Alpha 6mm Dasher  with an Alpha Legacy Reamed Chamber

25 Cal x 30°

• 25 Creedmoor

• 25 x 47 Lapua

• 25 PRC

• 25 SAUM

• 25 SST

6.5mm x 20°

• 260 Remington

6.5mm x 30°

• 6.5 Creedmoor

• 6.5 PRC

• 6.5 SAUM

• 6.5 x 47 Lapua

6.5mm x 35°

• 6.5 WSM

• 6.5 x 284 Winchester

6.5mm x 40°

• 260 Ackley Improved

• 6.5mm Wildcat cartridges with a 40 degree shoulder

6.5mm x 55mm Swedish

• 6.5mm x 55mm Swedish

270 Winchester

• 270 Winchester

7mm x 20°

• 7mm-08

7mm x 25°

• 7mm Rem Mag
• 7mm STW

7mm x 30°

• 7mm SAUM

• 7mm Creedmoor

• 7mm LRM

• 7mm PRC

7mm x 35°

• 284 Winchester

• 7mm WSM

• 7mm/300 WSM

7mm x 40°

• 7mm-08 Ackley Improved

• 280 Ackley Improved

• 7mm Wildcat cartridges with a 40 degree shoulder

7mm Sherman Short

• 7mm Sherman Short, 40° Shoulder, .125” Neck/Shoulder Radius

.30 Cal x 20°

• 308 Winchester

• Wildcat Cartridges necked down from the 308 Winchester

.30 Cal x 30°

• 300 SAUM

• 300 PRC

• 300 RUM

.30 Cal x 35°

• 300 WSM

.30 Cal x 40°

• 300 Norma Mag Ackley Improved

• .30 Caliber Wildcat cartridges with a 40 degree shoulder

300 Blackout

• 300 Blackout

25-06 Springfield

• 25-06 Springfield

6.5-06 Springfield

• 6.5-06 Springfield

30-06 Springfield

• 30-06 Springfield

300 Winchester Magnum

• 300 Winchester Magnum

300 Norma Magnum

• 300 Norma Mag

338 Cal x 20°

• 338 Federal

338 Cal x 35°

• 33 Nosler

338 Cal x 40°

• 338 Lapua Magnum Ackley Improved

• 338 Norma Ackley Improved

• 300 Norma Ackley Improved

338 Lapua Magnum

• 338 Lapua Magnum

• Wildcat Cartridges necked down from the 338 Lapua Magnum

338 Norma Mag

• 338 Norma Magnum

• Wildcat Cartridges necked down from the 338 Norma Magnum

33XC

• 33XC

37XC

• 37XC

375 Cheytac

• 375 Cheytac

375 Enabler

• 375 Enabler

IF MEASURING FOR HEADSPACE OFF OF A REAMER PRINT PLEASE SELECT AN INSERT FROM THE BELOW DATUM GAUGE LIST

Datum A .330″

• 17 Remington
• 204 Ruger
• 221 Remington Fireball
• 222 Remington
• 222 Remington Magnum
• 223 Remington
• 220 Swift

Datum B .350″

Datum C .375″

• 6mm Remington
• 257 Roberts
• 25-06 Remington
• 270 Winchester
• 7 X 57mm Mauser
• 280 Remington
• 30-30 Winchester
• 30-06 Springfield
• 300 H & H Magnum
• 7.62 X 39mm, M43
• 6.5 X 55mm Swedish
• 7mm Winchester Short Magnum
• 30-40 Krag
• 6.5 Creedmoor
• 6.5mm X 47 Lapua

Datum D .400″

• 223 Winchester Super Short Magnum
• 243 Winchester
• 243 Winchester Super Short Magnum
• 260 Remington
• 270 Winchester Short Magnum
• 7mm-08 Remington
• 300 Savage
• 308 Winchester
• 35 Remington

Datum E .420

• 6.5mm-284
• 284 Winchester
• 7mm Remington Magnum
• 7mm Remington Ultra Magnum
• 300 Winchester Short Magnum
• 300 Weatherby Magnum
• 325 Winchester Short Magnum
• 338 Winchester Magnum
• 375 H & H Magnum
• 264 Winchester Magnum
• 7mm Remington Short Action Ultra Magnum
• 7mm Shooting Times Westerner
• 300 Remington Short Action Ultra Magnum
• 300 Winchester Magnum
• 300 Remington Ultra Magnum
• 8mm Remington Magnum
• 338 Remington Ultra Magnum
• 35 Whelen

Please choose 4 of the below inserts for your kit.