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Every gunsmith knows that proper use of a headspace gage is the most reliable way to test the length of a rifle chamber. “Headspace” is the distance between the face of the breech and the base of the cartridge when the action is closed, and excessive headspace can be dangerous as well as impair accuracy. For instance, unsupported brass fired in a rifle action with excessive headspace can rupture, allowing gas to blow rearward like rocket exhaust. Because your safety is on the line, Forster Headspace Gages are made with painstaking care and exacting manufacturing standards to ensure accurate testing of your rifle’s chamber. If a rifle closes on a GO gage, the rifle chamber will accept any ammunition that is made within SAAMI (industry standard) specifications. If a rifle closes on a NOGO gage, the rifle chamber might have excessive headspace. Most gunsmiths chamber a rifle’s headspace between the GO and NOGO dimensions. If a rifle closes on a FIELD gage, the rifle chamber is dangerously close to or already over the SAAMI specified maximum chamber size.
There are other calibers available but please just let us now which you require upon placing your order, if they are not included in the drop down below we will have to order them in.
Barcode | fors-go/nogo-gage |
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SKU | fors-go/nogo-gage |
Brand | Forster Products |
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!
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Q1: Do you ship to my country?
A1: European countries (All items except Ammunition, Powders, Primer, Cases & Projectiles)
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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
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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.
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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.
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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.
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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