Showing all 12 resultsSorted by latest
-
Underwood 50 Beowulf Ammo 350 Grain Lehigh Xtreme Penetrator Fluted Box of 500
Original price was: $1,600.00.$1,000.00Current price is: $1,000.00. Add to cart -
Alexander Arms AR-15 Complete Upper Receiver 50 Beowulf 16.5″ Barrel without Handguard
Original price was: $800.00.$450.00Current price is: $450.00. Add to cart -
Alexander Arms Hunter Semi Automatic Rifle
Original price was: $1,700.00.$950.00Current price is: $950.00. Add to cart -
Underwood 50 Beowulf Ammo 420 Grain Lehigh Xtreme Penetrator Fluted Lead Free Box of 500
Original price was: $1,800.00.$1,200.00Current price is: $1,200.00. Add to cart -
Alexander Arms 50 Beowulf Ammo 350 Grain Flat Nose Box of 500
Original price was: $700.00.$450.00Current price is: $450.00. Add to cart -
Underwood 50 Beowulf Ammo 375 Grain Flat Nose Lead Free Box of 500
Original price was: $950.00.$600.00Current price is: $600.00. Add to cart -
Alexander Arms 50 Beowulf Ammo 300 Grain Hornady FTX Polymer Tip Box of 500
Original price was: $1,200.00.$750.00Current price is: $750.00. Add to cart -
Underwood 50 Beowulf Ammo 350 Grain Hornady XTP Jacketed Hollow Point Box of 500
Original price was: $1,000.00.$650.00Current price is: $650.00. Add to cart -
Alexander Arms 50 Beowulf Ammo 350 Grain Hornady XTP Jacketed Hollow Point Box of 500
Original price was: $1,000.00.$650.00Current price is: $650.00. Add to cart
50 Beowulf Ammo Canada For Sale in Canada | Canada Ammo Source

The first time I touched off 50 Beowulf ammo, I understood its appeal. It hits with authority, yet it stays controllable in the AR platform. If you want 50 Beowulf Ammo for sale in Canada, CanadaAmmoSource.com helps you stock up in bulk and stay ready.
This cartridge is also called 12.7×42 Ammo (12.7×42mm). It was built for short-to-mid range stopping power from an AR-15-sized rifle. That “big-bore in a familiar rifle” feeling is exactly why people keep coming back.
Shop smarter while you browse: start with the bulk 50 Beowulf ammo in Canada category, then compare options across the Rifle Ammo bulk deals section.
What Is 50 Beowulf Ammo?
50 Beowulf ammo is a large-caliber rifle cartridge designed to run in AR-15 rifles. It uses a .500-inch bullet in a straight-walled case with a rebated rim. In plain English, it’s a heavy hitter that delivers big energy at practical distances.
It’s commonly listed as 50 Beowulf ammunition, 50 Beowulf cartridges, or 50 Beowulf rounds. You may also see it labeled as 12.7×42 because “.50 Beowulf” is a trademarked name.
History of 50 Beowulf (12.7×42)
The 50 Beowulf (12.7×42mmRB) was developed by Bill Alexander of Alexander Arms around 2001. The concept was simple: increase stopping power from the AR-15 platform without moving to a larger receiver. That origin story is why the round still feels purpose-built today.
It grew from a specialized concept into a recognized sporting option. Many writers now describe it as a legitimate short-range hunting cartridge for North American game. That shift helped expand ammo choices and rifle builds.
Types of 50 Beowulf Ammunition
Different bullets change how 50 Beowulf ammo behaves on target. Choose the load based on your real use, not hype. CanadaAmmoSource.com lists several high-volume options in bulk packs.
Common 50 Beowulf ammunition types include:
-
FMJ (Full Metal Jacket): best for training and function checks.
-
JHP (Jacketed Hollow Point): faster expansion for hunting.
-
Polymer tip (like Hornady FTX): better feeding, controlled expansion.
-
Solid copper / lead-free (Barnes XPB): deep penetration and clean weight retention.
-
Fluted penetrators (Lehigh Xtreme Penetrator): straight-line penetration with wide wound channels.
If you also keep a small-caliber trainer, pair your big-bore days with cheap reps. Try the 5.56 ammo Canada bulk options for high-volume practice.
Specifications of 50 Beowulf Ammo (Table)
These specs explain why the cartridge runs in AR-15-sized actions. They also show why it behaves like a heavy, low-pressure thumper.
| Spec | Typical Value |
|---|---|
| Alternate name | 12.7×42mmRB (12.7×42 Ammo) |
| Bullet diameter | .500 in |
| Case type | Rebated rim, straight |
| Case length | 1.65 in |
| Overall length | 2.125 in |
| Max pressure | 33,000 psi |
| Common bullet weights | 300–400 gr |
| The test barrel is often referenced | 16 in |
Quick stat that matters: Wikipedia lists factory-style examples like 300 gr at ~1,870 fps and 400 gr at ~1,800 fps, producing roughly 2,330–2,878 ft-lbs at the muzzle. That’s serious close-range energy.
Design of the Ammunition
The rebated rim is the clever part. It helps the cartridge interface with AR-15 bolt geometry while keeping a wider case body. That design choice supports reliable feeding in semi-auto actions.
The straight-walled case favors a big frontal area and a consistent punch. It does not chase extreme velocity. Instead, it aims for heavy bullet performance inside realistic ranges.
What Is 50 Beowulf Ammo Used For?
Shooters pick 50 Beowulf ammo for roles where momentum matters. It shines when you want a strong impact without a full-size magnum rifle. Many owners use it for hunting, hog-style pest control in places where legal, and short-range defensive scenarios.
Practical use cases include:
-
Brush hunting for deer-sized game at close range.
-
Black bear or moose-capable loads in short-to-mid range settings.
-
Steel and “big bore fun” range days with a familiar AR feel.
-
Barrier-focused applications are often discussed in tactical contexts.
If you want a classic big-bore alternative, compare it with 45-70 ammo Canada bulk packs for lever-gun style power.
Effective Range
This is not a 600-yard cartridge. Most practical discussions put it inside 200–250 yards for best results. That range keeps dropping, and wind drift is manageable.
For many hunters, the “sweet spot” sits between 50 and 150 yards. That is where the cartridge feels fast, flat enough, and decisive.
Muzzle Velocity
Velocity depends on bullet weight and barrel length. Many common loads sit around 1,700–1,900 fps in 16-inch barrels. Alexander Arms also publishes data such as ~1,793 fps for a 300 gr FTX load from a 16-inch factory barrel.
That “moderate speed, heavy mass” balance shapes recoil and trajectory. You feel a firm push, not a sharp snap. It also explains why follow-up shots are doable.
50 Beowulf Ammo Ballistics Chart (Table)
Ballistics vary by load. The table below uses a common reference point: 300 gr FTX data published by Alexander Arms for a 16-inch barrel. Use it as a realistic baseline, not a promise.
| Range (yd) | Velocity (fps) | Notes |
|---|---|---|
| 0 | ~1,793 | Published muzzle velocity |
| 200 | Lower | Drop becomes meaningful |
| 258 | MPBR max | Listed “Maximum PBR” for a 19″ vital zone |
If you want a broader “energy feel,” Wikipedia’s examples show muzzle energy in the ~2,330–2,878 ft-lb range depending on bullet weight and load.
50 Beowulf Ammo vs 50 BMG

These two share a “.50” label, but they live in different worlds. 50 BMG is built for long-range performance and can remain effective well past 1,000 yards in the right system. 50 Beowulf focuses on heavy impact at short to mid range and fits AR-15-sized rifles.
The tradeoffs are clear:
-
50 BMG: more velocity, more reach, far more rifle weight.
-
50 Beowulf: lighter platform, milder recoil than big magnums, shorter effective range.
If you’re also shopping for big, long-range cartridges, see 50 BMG match ammo options.
50 Beowulf AR-15: What Shooters Should Know

.50 Beowulf AR-15
50 Beowulf was designed for the AR platform, typically as a dedicated upper and bolt setup. Many owners run it as a simple caliber swap, then return to smaller calibers later. That flexibility is part of its charm.
CanadaAmmoSource.com lists AR-oriented Beowulf components too. For example, you can find an AR-15 complete upper configured for the cartridge. That makes caliber conversion more straightforward for the right rifle setup.
Important Canada note: magazine legality and capacity rules can be complex and have been debated publicly. Before you buy mags or parts, confirm current Canadian rules and retailer guidance.
Best 50 Beowulf Ammo
“Best” depends on your goal. Here is how I’d bucket it as a shooter. Each example is listed on CanadaAmmoSource.com in bulk configurations.
Best for hunting-style expansion
-
Alexander Arms 300 gr Hornady FTX polymer tip (bulk pack).
-
Underwood 350 gr Hornady XTP JHP for classic hollow-point expansion.
Best for deep penetration and lead-free requirements
-
Underwood 275 gr Barnes XPB solid hollow point (lead free).
-
Underwood 420 gr Lehigh Xtreme Penetrator (lead free) for straight-line penetration.
Best for training volume
-
Underwood 350 gr FMJ for consistent function and simpler cost planning.
If you want to build a “big bore + trainer” routine, pair Beowulf with economical options like 7.62×39 bulk rifle ammo for cheaper reps.
Where to Buy 50 Beowulf Ammo Online in Canada?
If you need 50 Beowulf ammo for sale in Canada, buy it when you see it. Big-bore specialty cartridges can disappear fast, especially in bulk packs. CanadaAmmoSource.com lists Beowulf loads in large quantities like boxes of 500, which is ideal for consistent practice and hunting confirmation.
FAQ (People Also Ask Style)
- Is 50 Beowulf the same as 12.7×42 Ammo?
Yes, they refer to the same cartridge dimensions. “.50 Beowulf” is often treated as a branded name. - How far is 50 beowulf effective?
Most sources describe it as most practical inside about 200–250 yards. It’s strongest at closer ranges. - Is 50 Beowulf more powerful than 5.56?
At close range, it delivers far greater bullet mass and energy. It was designed to increase stopping power versus 5.56 in short-to-mid range contexts. - Can I use 50 Beowulf in an AR-15?
That was the design goal. Most setups use a dedicated upper and bolt for reliability. - Is 50 Beowulf ammo hard to find?
It can be, because it’s a specialty round. That’s why bulk purchasing matters when inventory appears.
Conclusion
50 Beowulf ammo delivers big-bore impact in a familiar AR-sized platform. It’s best inside 200–250 yards, where energy and control feel perfect together. If you want 50 Beowulf ammo Canada shooters can actually stock in bulk, CanadaAmmoSource.com is a practical place to start.
When you see the right load, move fast. Big-bore inventory does not wait. Use the bulk 50 Beowulf ammo in Canada category and lock in your supply today.
