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Hornady Head Space Gauges for OAL Gauge System

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horn-headspace

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.

As low as £11.80

LOCK-N-LOAD® HEADSPACE BUSHINGS


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 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


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
6.5mm-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

F .188" #F188
Bushing blank with .188 diameter hole


G .240" #G240
17 Hornet

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FAQ - Frequently Asked Questions

Welcome to our purchasing FAQ! Here you'll find answers to our most asked questions regarding purchasing from us. If you are after Reloading FAQ's, please click HERE, where you can find more specific question and answers. Still can't find quite what you're looking for, or have something we should know? Send us an email, we're happy to help!

  • Q1: Do you ship to my country?

    A1: European countries (All items except Ammunition, Powders, Primer, Cases & Projectiles)

  • Q2: How much do I pay for shipping?

    A2: The shipping charge will be added to your order and visible on your receipt before you check out. The shipping is based on the destination country. You’ll get free shipping on orders above a certain amount.

    Free shipping on orders above: £50 for mainland UK next day deliveries.

    France - £25
    Norway – £45
    Finland – £46
    Germany – £25
    UK – £5 (Free UK Mainland with purchases over £50)
    Rest of the EU – £25-100
    Global – £100-200

  • Q3: What are the accepted payment methods?

    A3: We accept online card payment with MasterCard, VISA, Worldpay or Bank Direct Debit

  • Q4: What currency do I pay in?

    A4: The currencies used are GBP, EUR & USD The currency is chosen automatically depending on your shipping country.

  • Q5: When do I receive my order?

    A5: We dispatch all orders in 1-2 business days with DPD & Parcelforce, delivery time will depend on the shipping country and address.

  • Q6: Do I have to pay international taxes and duties?

    A6: Your order may be subject to import duties and taxes, which are levied once a shipment reaches your country. We cannot control and is not responsible for any duties/taxes applied to your package upon delivery. You will be responsible for paying additional charges for customs clearance. Customs policies vary widely from country to country; please contact your local customs office for further information.

  1. Set up your reloading bench where it (and stored components) will not be exposed to heat, sparks or flame.
  2. Establish a comfortable loading procedure and don't vary it.
  3. Keep your reloading bench, equipment and area clean and uncluttered. Label components and reloads for safe, easy identification. Never use powder from an unlabelled tin.
  4. Understand what you are doing and why it must be done in a specific way.
  5. Follow loading recommendations exactly. Don't substitute components for those listed in metallic data without reducing the load and working back up.
  6. Never substitute smokeless powder for black powder or Pyrodex because smokeless powder is much more powerful than black powder. Never mix two powders together.
  7. Wear safety glasses.
  8. Stay alert when reloading. Don't reload when distracted, disoriented or tired.
  9. Don't smoke, drink alcohol or take drugs while reloading or while in your reloading area.
  10. Keep everything out of reach of small children.
Rifle Calibre Name Common Metric Name Bullet Diameter
.17 4.5mm .172" 
.204 5.2mm .204"
.223 5.56mm .224"
.22 (Rimfire) 5.6mm .223"
.22 (Centrefire) 5.6mm .224"
.243 6mm .243"
.257 6.53mm .257"
.260 6.5mm .264"
.270 6.8mm .277"
.280 7mm .284"
.30 7.62mm .308"
.325 8mm .323"
.33 8.6mm .338"
.366 9.3mm .366
.375 9.5mm .375"
.416 10.6mm .416"
.50 13mm .510"

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