Category Archives: Shooting in General

What is the 12.7x42mm cartridge? Is it the same as .50 Beowulf?

The short answer is that they are the same thing. The bullet’s diameter is 0.50″ which is 12.7mm and the case length is 1.65″ or 42mm. The reason you see some vendors say they have something to sell in 12.7x42mm is they are trying to avoid a trademark problem with Alexander Arms. In other words, they are the same thing and people are trying to avoid a trademark infringement lawsuit.

Bill Alexander, of Alexander Arms, did all the engineering to bring to life both the round and the AR components to use it. He trademarked the term “.50 Beowulf”. As such, anybody who wants to sell something and refers to it as being for .50 Beowulf would need to get the permission and/or license the use of “.50 Beowulf” to avoid legal problems. So, a lot of vendors use the generic metric designation of 12.7×42 to avoid legal hassles.

With that said, bear in mind that not all engineering is equal. I have never had a problem with Alexander Arms parts but myself and others have had plenty of headaches with 12.7×42 components from budget AR vendors who haven’t done the engineering so buyer beware and research a vendor and their offering before you buy plus make sure they are reputable in general in case you need support.

So, short post this time. 12.7×42 and .50 Beowulf are the same round with different descriptions. but be cautious to check out vendors selling parts using the metric designation.


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My apologies but I have no way to filter out items that the vendors have sold out such as ammo. For example, most places sell out of the ammo fast but you should keep an eye on both Midway USA and going to Underwood Ammo directly – Underwood makes very good ammo by the way. I usually run Alexander Arms ammo but they are sold out most places and while you can place an order directly, you will need to wait quite a while for it to be made and shipped.

Yes, Sellier & Bellot (S&B) Makes Good Ammo

Many folks are new to firearms these days or they are experienced and scrambling to find ammo. This means they are encountering brands they may never of heard of and Sellier & Bellot (S&B) is one such example. I get asked regularly if they make good ammo and if I would recommend their pistol or rifle and the answer is a definite YES.

First off, S&B is a Czech company that was founded in 1825. The Czechs produce some excellent small arms, such as the cz.75 pistol, and S&B turns out some great ammo. My point is that they know their stuff.

I have been using S&B ammo for years including 12ga shot shells, 8mm Mauser, .308, 9mm 115 grain and 124 grain full metal jacket (FMJ) plus 10mm 180 grain FMJ rounds. I use it for firearm testing and shooting at the range and have shot thousands of rounds with not one failure that I could attribute to the ammo – bear in mind I am using it often to test and break in guns. For example, the recoil impulse of the 9mm 124 grain ammo is great for breaking in pistol caliber carbines (PCCs) as well as newly built Polymer80 pistols.

I’ll keep this post short, S&B ammo is good to go. Below are some vendors with S&B offerings:


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Airgun Depot Has a Ton of Hatsan Airgun Models Ready to Ship Including Gladius Bullpups

Folks, I am very impressed by my Hatsan airguns and have no problem recommending them. I’m rally a fan on the pre-charged pneumatic (PCP) guns that have an onboard air tank and can fire 10-20 rounds for hunting plus if you get one if their models with the Quiet Energy (QE) baffle system, they are on the discrete side for pest control.

Airgun Depot has a ton of models in stock right now including the Hatsan Gladius that I have bagged tons of squirrels, rabbits and even a raccoon cleanly with. I have the Gladius Long model in .22 and it seriously takes out pests with JSB Jumbo Diablo 18.13 grain pellets.

This is my Gladius Long in .22 and I use it all the time for pest control. Probably over 1,000 if not 1,500 pellets have been shot through that airgun now.

The Gladius .22 has a 10 round magazine and is a bolt action repeater. It carries three spare magazines at the rear under the stock and they come in handy when you need to rapidly reload. It does happen with pest control actually.

The Gladius comes with four magazines. I have one loaded in the receiver, two ready to go securely clicked into their storage bays and you can see I already have one magazine that needs to be reloaded.

So, check out Airgun Depot. They have very good prices and availability right now. Click here for Hatsan in general or here for the Gladius specifically. If you are interested, click here for my other blog posts about my Hatsan airguns.


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