The Lock-N-Load® Headspace Comparator extends brass life, improves accuracy, and enhances safety. The gauge measures variations in brass before and after firing or re-sizing. It allows for headspace comparison between fire-formed brass and re-sized brass.

The five bushings that come with the Lock-N-Load® Headspace Comparator provide the ability to check most bottleneck cases, from .17 Rem through belted magnums. Ackley Improved chambers use the same bushing size as the parent case. See chart provided or consult product instructions for cartridge/bushing size details.

Notes:

All bushing are interchangeable.
Works on all bottleneck type cases and wildcats.
This set fits 17 caliber through belted magnums.
Must be used with Calipers.

Includes:

Comparator body B-2000 Gauge
5 bushings
Allen wrench

Body with 5 Bushing Set Item #HK66

5 Bushings Only Item #HK55

Lock-N-Load^® Headspace Bushings

F .188"

Bushing blank with .188 diameter hole

G .240"

17 Hornet

A .330"

17 Remington

204 Ruger

221 Remington Fireball

222 Remington

222 Remington Magnum

223 Remington

220 Swift

B .350"

22 PPC

22-250 Remington

6mm PPC

6mm Bench Rest Remington

250-3000 Savage

7mm Bench Rest Remington

300 Blackout

6.5 Grendel

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 39 British

6.5 X 55mm

7mm Winchester Short Magnum

30-40 Krag

6.5 Creedmoor

6.5mm X 47 Lapua

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

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

350 Remington 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