6.5mm Ammo Breakdown: Best for Accuracy & Distance

The 6.5mm round is a favorite among shooters, and its likely one of your favorites too (and if not, why not?).  

It’s been tried, tested, and put to good use since 1894 when the 6.5x55mm Swedish Mauser cartridge was invented and used by the Swedish and Norwegian military forces for a whopping 101 years.

6.5x55mm Swedish Mauser

While the Swedish Mauser is still being used today, there are a number of other contenders within the 6.5mm cartridge family that helped to contribute to its newfound popularity.  

Today, we’re going to take a look at just what the buzz is all about with the 6.5mm family of rounds, and what the differences are between them.

Let’s get to it.

What Makes the 6.5mm Family of Rounds So Popular?

Rounds like the 6.5mm Creedmoor and 6.5mm Grendel have helped catapult this powerful round into stardom.  They’ve become a common round for some of our most favorite rifles, including hunting rifles by Ruger and Savage, rifles on the AR-10 and AR-15 platforms, and tactical sniper rifles like the Ruger Precision Rifle.

Ruger Precision Rifle hybrid sniper rifle
Ruger’s hybrid sniper rifle, the Precision Rifle, available in 6.5m Creedmoor

But the cartridge’s popularity begs the question: what came first, the chicken or the egg?  Or in this case, the popularity of the rifles or the round?

The truth is that the 6.5mm round began to gain popularity once it became a favorite among competitive shooters who loved the round because it remains powerful and accurate, but offers less recoil than the .308 Win.  In many ways, shooters felt like the 6.5mm gave them a competitive advantage over the .308 cartridge – and thus a new generation of sniper rifles compatible with the 6.5mm were born.

In addition, the 6.5mm’s rise to fame also coincides with increased popularity of tactical precision rifle shooting competitions.

But what exactly are the differences between the various members of the 6.5mm family?  Let’s take a look.

6.5mm x 55 Swedish Mauser

The one that started it all.  The 6.5mm x55 Swedish Mauser is nearly 125 years old and is still going strong.  Known for its low recoil and pinpoint accuracy, this round has really been able to stand out in competitive shooting and on mid-sized hunting trips.

Swedish Mausers on a clip
Swedish Mausers on a clip

Even in today’s terms, the Swedish Mauser is more than a functional cartridge – it’s downright lethal.  It’s been featured in a variety of hunting rifles, including the Remington 700 and the Winchester Model 70, and has been a favorite for deer, elk, reindeer, and moose hunts.

6.5mm Grendel

The 6.5mm Grendel is an AR-15 round that’s been around for almost 15 years now.  It’s designed with the intention of being more accurate than its .223 counterpart, while also being able to boost power without adding any real recoil.  

Generally speaking, you’ll find mixed reviews with regard to whether Grendel is better than the .223, but it is praised for being able to travel 800 yards without losing significant accuracy.

In addition, the Grendel will fit in your standard 5.56×45 magazine and turn a 30-round mag into a 20-round one.

6.5mm grendel bullet options
6.5mm Grendel with several bullet options

In terms of hunting, the Grendel has developed quite the cult following who prefer it over the .308 Win.  For starters, it has all of the knockdown power needed to drop that beastly buck or elk, plus it’s lighter and offers less recoil than the .308.

The only real problem that some shooters have is availability.  While the .308 is certainly not going anywhere anytime soon, some people are worried if 6.5mm cartridges like the Grendel will be less popular in the next decade or two.  

Personally, I don’t think they’re going anywhere.  If you think otherwise…we recommend the Ballistic Advantage barrels ($250).

6.5mm Creedmoor

The 6.5mm Creedmoor is a beast that’s designed specifically to compete with the .308 Win cartridge.  Many hunters believe that the Creedmoor is an all-around better round due to the fact that it’s lighter, faster, and offers up far less recoil than its Winchester counterpart.

That’s not to say that the .308 isn’t an excellent hunting round, but tests show that the 6.5 Creedmoor does perform better between 700 – 1000 yards than the .308.

6.5 Creedmoor
The 6.5 Creedmoor

The truth is that the 6.5mm Creedmoor’s performance has been impressing marksmen for a decade.  

Even the US Military has been looking into dropping the 7.62 and switching over to a 6.5mm Creeedmoor because of its better performance and significantly less wind drift than the current long-range round.  Whether or not the military will go through with the switch remains to be seen, but it does prove that the 6.5mm Creedmoor is an exemplary round for long-distance shooting.

And it’s easy to get into…if you already have an AR-10 (.308) platform, all you need is a complete 6.5mm Creedmoor upper.  We suggest the Aero Precision 20″ or 22″ ($635).

Aero Precision 6.5 Creedmoor Complete Uppers
Aero Precision 6.5 Creedmoor Complete Uppers

And if you’re building…the bolt and magazines are the same…all you’ll need is a new barrel.  We recommend Ballistic Advantage ($250).

Ballistic Advantage 20 6.5mm Creedmoor Barrel
Ballistic Advantage 20″ 6.5mm Creedmoor Barrel

6.5mm x 47 Lapua

Designed specifically for bench shooting, the 6.5mmx47 Lapua is a mid-sized cartridge that provides accuracy and minimal recoil when compared to the .308 Winchester.  Generally speaking, it functions quite similarly to the .260 Remington, but with one added benefit: guns that shoot the .308 can easily be converted to fire the 6.5 Lapua.

6.5x47 Lapua, with a cutaway view on left
6.5×47 Lapua, with a cutaway view on left

Because the 6.5 Lapua and the .308 share similar dimensions, all you need to do to make the transition over is swap out the barrel.  And compared to the 6.5mm Creedmoor, the 6.5 Lapua delivers the same overall level of accuracy.

.260 Remington

The .260 Remington (or 6.5-08 for you folks in countries that speak metric) was created primarily to compete with the 6.5mm x 55 Swedish Mauser.  Like other 6.5mm cartridges, it boasts accurate at longer ranges and less recoil than the .308 Win.  Its accuracy has made it a popular round during long-range shooting competitions up to 1000 meters.

260 Remington

The biggest complaint about the .260 Remington round historically was the lack of variety.  But these days, you can find the .260 in a number of different grain weights.  Aside from that, it’s also said to be a little harsher on the barrel than its .308 counterpart.

Still, the .260 is an excellent round for law enforcement and hunting.  While not as popular as the .308, it can be used to take down medium game with relative ease.

.264 Winchester Magnum

The .264 Winchester Mag has been around since 1959.  And while it’s always been a solid cartridge, it never really saw the popularity that it deserved.  Some of this was its reputation for being extremely harsh on the barrel, but it didn’t really cause any more stress than most other magnum rounds.

.264 Winchester Magnum
.264 Winchester Magnum

The .264 Winchester was pretty accurate round, but it doesn’t do nearly the distance as some of the other 6.5mm cartridges.  In fact, you can probably expect around a three inch drop as soon as the bullet travels about 500 yards.  With that said, it’s always been a solid cartridge for mid-sized game like deer and elk.

These days, the .264 isn’t quite the barrel-eating round that it was known for in the 1960s.  You can thank that on the improved technology that’s helped make barrel steel stronger and more protected against wear and tear.  So what was known to eat away at barrel throats after 100 or so shots now holds up anywhere between 700 and 1000 fired rounds.

6.5mm vs .308 Winchester

Now that the 6.5mm family has finally experienced the popularity it’s always deserved, a lot of people are forsaking their .308s for these smoother rounds.  But does that mean that the .308 Win has been made obsolete?

Short answer: no.

Size comparison of some 6.5mm cartridges, left to right: .264 Winchester Magnum, 6.5×55mm Swedish, .260 Remington, 6.5mm Creedmoor, 6.5mm Grendel
Some 6.5mm cartridges, left to right: .264 Winchester Magnum, 6.5×55mm Swedish, .260 Remington, 6.5mm Creedmoor, 6.5mm Grendel

Unless you’re doing most of your hunting from long-range, you’re not really going to feel too much of a difference between the .308 and your 6.5mm cartridge – especially if you’re shooting at a target less than 300 yards away.  In this context, they’re both quite equal in effectiveness at dropping a mid-sized animal.

It’s also important to remember that the .308 is always going to be readily available due to its popularity.  While I firmly believe that the 6.5mm cartridges aren’t going anywhere in the future, they just haven’t reached the same level of usage as the .308, which means that you might not always be able to pick up a box of Grendels or Creedmoors in a pinch.

It doesn’t make one cartridge better than the other – it’s just a numbers game that the .308 happens to win.

Alternative AR-15 cartridges
Alternative AR-15 cartridges

However, when we’re talking about competition shooting, a round like the 6.5 Creedmoor, 6.5 Grendel, or 6.5 Lapua – and even the .260 Remington – is going to outperform the .308 nearly every time.  That lack of recoil and improved accuracy between 700 – 1000 yards is crucial in making the 6.5mm family better cartridges for long-distance shooting (and even tactical situations).

But remember, both the .308 and the 6.5mm family serve different purposes.  

At the end of the day, shooting a Grendel or Creedmoor doesn’t make you a better shooter.  It’s about knowing the limitations of each cartridge you’re shooting with.  If you do that, you’re already on your way towards being a marksman.

Anyone here rocking an AR-10, AR-15, or bolt-action hunting rifle with 6.5mm ammo?  Have a favorite member of the 6.5mm family? Let us know!

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6 Comments on "6.5mm Ammo Breakdown: Best for Accuracy & Distance"

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KJE
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I really like your website and appreciate what you are doing, older gun enthusiasts frequently look down on newbies and are often condescending to them when they ask questions. This is not good for future generations of gun owners. Your website educates people in a simple and clear way, thank you for recognizing this need and thank you for your initiative in correcting it. I also appreciate how you recognize the 6.5X55 Swedish Mauser as way ahead of its time. Its reputation in Europe has been legendary and that has been won competing against other popular rounds such as the… Read more »
Yer
Guest

Confused on your comment that the .264 win mag does not do the same distance as the other 6.5 cartridges. Wouldn’t this cartridge push all 6.5 bullet weights faster across the board, making it shoot flatter and hit harder? Of course it’ll have more recoil and less barrel life.

Daniel
Guest

I have adopted the 6.5 creedmoor as my new hunting cartridge. Although, I don’t really shoot beyond 150yds at deer, I feel the 6.5 has a lot more knock down power over my tried and trusted 308. I know the numbers may say otherwise but from what I have experienced in the field, the 6.5 seems to destroy less meat and kill faster. I am not sure why this may be but, that is just what I have noticed in the past 4 seasons.

John
Guest

Can you shoot the 6.5 mm Swedish Mauser and 6.5 mm creedmoor through same rifle

Eric Hung
Admin

Hi John, they are different lengths so they would not shoot through the same rifle.

Jeff Wright
Guest

What about the 6.5 X .284 that round is very popular with F-Class Open