Lock-N-Load® Headspace Comparator & Anvil Base Kit

Photo of Lock-N-Load® Headspace Comparator

Lock-N-Load® Headspace Comparator

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.

Body with 5 Bushing Set Item #HK66

5 Bushings Only Item #HK55

Determining the proper bushing diameter: If you add the neck diameter and the shoulder diameter and divide that number by two, use the bushing closest to that number.

Lock-N-Load® Headspace Bushings

F .188" #F188
Bushing blank with .188 diameter hole
G .240" #G240
17 Hornet
A .330" #A330
17 Remington
204 Ruger
221 Remington Fireball
222 Remington
222 Remington Magnum
223 Remington
220 Swift
B .350" #B350
22 PPC
22-250 Remington
6mm PPC
6mm Bench Rest Remington
250-3000 Savage
7mm Bench Rest Remington
300 Blackout
6.5 Grendel
6mm ARC
C .375" #C375
6mm GT
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
D .400" #D400
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" #E420
6.5 PRC
284 Winchester
7mm Remington Magnum
7mm PRC
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

Anvil Base Kit

Item #AB1

The anvil attaches to the opposite blade of your caliper when utilizing the Hornady® Lock-N-Load® Headspace Comparator, supplying a large surface area for case heads and bullets to rest, making ogive and headspace measurements easier to obtain.

HK66 HK55 AB1 G240 A330 B350 C375 D400 E420 F188 #HK66 #HK55 #AB1 #G240 #A330 #B350 #C375 #D400 #E420 #F188