Barrel Length: What Are You Actually Giving Up?

Short-barreled hunting rifles have become increasingly popular.

Suppressors are a major reason why. Hunters who once considered a 22- or 24-inch barrel completely normal are now looking at 16-, 18-, and 20-inch barrels because adding another 6 to 8 inches of suppressor changes the equation.

That usually leads to one question: How much performance am I giving up by shortening the barrel?

It's a good question. But barrel length isn't simply a contest between short and handy versus long and fast. The right barrel length depends on the cartridge, ammunition, suppressor, intended shooting distance, rifle weight, balance, and ultimately what you're asking the rifle to do.

The goal shouldn't be to build the shortest rifle possible. It shouldn't be to chase every last foot per second either.

Why Does Barrel Length Affect Velocity?

When a cartridge fires, expanding gas created by the burning powder accelerates the bullet down the bore. While sufficient pressure remains behind the bullet, additional barrel length generally gives that pressure more time to accelerate it. Shorten the barrel and the bullet exits sooner. That generally means less muzzle velocity.

Simple enough. Where things get complicated is trying to assign one universal number to the velocity loss.

You'll commonly hear statements such as: “You lose 25 FPS per inch.”

That can be useful as a rough conversation starter. It should not be treated as a law. The actual change depends on the cartridge, powder, bullet, barrel, chamber and the lengths being compared. Some combinations may lose relatively little velocity per inch. Others can lose considerably more.

And two barrels of identical length can produce different velocities with the same ammunition. Don't assume. Measure. If velocity matters to the application, a chronograph tells you what your rifle is actually producing.

Not Every Cartridge Responds the Same Way

Different cartridges have different case capacities, operating characteristics and intended applications. A cartridge that performs extremely well from a relatively short barrel may give up little that matters for a particular hunting application. Another cartridge may have been selected specifically because of its velocity potential.

Cutting that rifle extremely short can begin working against the reason you chose the cartridge in the first place.

That's why asking “Is an 18-inch barrel enough?” doesn't give us enough information. Enough for what? Which cartridge? Which bullet? What muzzle velocity? What hunting distance? Suppressed or unsuppressed? What terminal velocity does the bullet require?

Those questions matter more than the barrel-length number by itself.

What Does 100 FPS Actually Cost You?

Instead of automatically assuming that losing velocity is unacceptable, ask what that velocity difference actually changes.

Suppose shortening a particular rifle costs roughly 100 FPS. That doesn't automatically mean you've ruined the rifle. We need to look farther downrange. What happened to trajectory, wind drift, time of flight, impact velocity, terminal performance, and maximum practical hunting distance?

At moderate distances, the practical difference may be smaller than many shooters expect. As distance increases, however, the difference becomes increasingly relevant. The slower bullet begins with less velocity and reaches important velocity thresholds sooner.

That's especially important for hunters.

Impact Velocity Matters More Than the Number at the Muzzle

Hunters tend to focus heavily on muzzle velocity. But the animal isn't standing at the muzzle. What matters when the bullet reaches the target is impact velocity.

Hunting bullets are designed to operate within certain velocity ranges. Depending on the projectile, dropping below an appropriate impact velocity can change expansion and terminal performance. That means barrel length can indirectly affect the practical range of a hunting system.

If shortening the barrel reduces muzzle velocity, the bullet will also reach a given minimum impact velocity at a shorter distance. For a hunter shooting relatively moderate distances, that difference may never become relevant. For someone planning to extend the rifle considerably farther, it might.

Then Came the Suppressor

Suppressors have changed what many hunters consider a practical barrel length. Consider the complete system.

A 24-inch barrel with a 7-inch suppressor can create a rifle with roughly 31 inches of barrel-and-suppressor length ahead of the action, depending on the mounting system and suppressor design. That may shoot beautifully. It may also be cumbersome.

Shorten the barrel to 18 or 20 inches and suddenly the suppressed rifle can have an overall length closer to what hunters traditionally carried without a suppressor. That's a meaningful advantage.

Getting the rifle in and out of a vehicle is easier. Moving through timber is easier. Working inside a blind can be easier. The rifle can feel substantially different from unsupported and positional shooting.

That's why a suppressed rifle should often be considered as a complete package from the beginning. If you know the rifle will spend nearly its entire life suppressed, it makes sense to consider the suppressor when choosing barrel length rather than building the rifle first and treating the suppressor as an afterthought.

Shorter Doesn't Automatically Mean Lighter

It's tempting to think shortening a barrel always creates a dramatically lighter rifle. Sometimes it does. But barrel contour matters.

Removing several inches from a heavy contour barrel can remove meaningful weight. Doing the same thing to a light-profile barrel may produce a much smaller difference. And adding a suppressor puts weight right back at the muzzle end of the rifle.

This brings us to something we've discussed before: balance matters. A rifle's total weight doesn't tell you how that weight is distributed.

A compact suppressed rifle that balances well may feel considerably easier to shoot than a longer rifle carrying excessive weight forward. Conversely, going extremely short and light can create a rifle that's less stable and less forgiving from field positions. The scale only tells part of the story.

Don't Ignore Muzzle Blast

There is another tradeoff with short barrels that doesn't receive as much attention: blast.

As barrel length decreases, the bullet can exit while pressure at the muzzle is still relatively high. The result can be substantially more muzzle blast. Depending on the cartridge and barrel length, the difference can be dramatic.

If the rifle will always be suppressed, that may influence your decision. If it will frequently be fired unsuppressed, it deserves considerably more consideration. A rifle that's wonderfully compact but miserable to shoot isn't necessarily an improvement.

Does a Short Barrel Hurt Accuracy?

Not inherently. Barrel length by itself does not determine whether a rifle can shoot small groups. A quality short barrel can be extremely accurate. In fact, shortening a barrel can increase stiffness depending on the contour and construction.

But we need to separate two different ideas: accuracy and ballistic performance.

A 16-inch barrel may produce excellent groups while generating less velocity than a 24-inch barrel chambered for the same cartridge. Both things can be true simultaneously.

Don't mistake lower velocity for lower mechanical accuracy. And don't assume a longer barrel is automatically more accurate because it's longer.

Longer Isn't Free Either

We spend a lot of time discussing what we lose when shortening a barrel. But adding length has tradeoffs too. Longer barrels can mean more weight, more forward weight, greater overall length, more cumbersome suppressed handling, and more difficult maneuvering in tight spaces.

Eventually you can reach a point where additional velocity comes at the expense of the rifle's practical handling.

If adding four inches of barrel gains velocity that meaningfully extends the rifle's intended capability, that may be worthwhile. If those four inches make the rifle noticeably worse to carry and shoot while adding performance you'll never use, what's the benefit?

More isn't automatically better.

Build Around the Actual Hunt

Think about where the rifle will spend its life. A mountain rifle carried miles every day presents one set of priorities. A whitetail rifle used from a blind presents another.

A rifle carried through thick timber is different from a rifle intended for open-country western hunting. A dedicated long-range hunting rifle may prioritize velocity differently than a compact rifle used primarily inside 300 yards.

And a rifle that will always wear a suppressor deserves different consideration than one that never will.

This is why copying someone else's barrel length from the internet isn't necessarily useful. They may be solving an entirely different problem.

How Short Is Too Short?

There isn't one answer. That's the point. Instead, work backward from the application.

• What cartridge am I using? Understand how the cartridge performs from the barrel lengths you're considering.
• What bullet am I using? Know the projectile's intended terminal-performance window.
• What velocity does my actual rifle produce? Chronograph it rather than relying entirely on advertised numbers.
• What is my realistic maximum hunting distance? Not the farthest distance imaginable — the distance you realistically intend to use the rifle.
• What will my impact velocity be at that distance? Make sure the bullet is still operating where you want it.
• Will the rifle be suppressed? If yes, consider suppressor length and weight as part of the rifle from the beginning.
• How does the complete rifle handle? Because a ballistic advantage isn't very useful if you've created a rifle you don't shoot well.

Don't Build a Rifle Around One Number

It's easy to obsess over specifications: 16 inches. 18 inches. 20 inches. 2,850 FPS. 7 pounds. Half MOA.

But no individual specification tells you whether the rifle is good. A rifle is a collection of compromises designed around an intended job.

Velocity matters. Weight matters. Length matters. Balance matters. Recoil matters. Accuracy matters. Terminal performance matters. And the shooter matters.

The best rifle isn't necessarily the one that maximizes any single category. It's the one where those categories work together.

The 701 Take

We're not automatically in the “shorter is better” camp. We're not automatically in the “longer is faster, therefore better” camp either. Both approaches oversimplify the decision.

If shortening a barrel makes a suppressed hunting rifle dramatically easier to carry and handle while still providing the velocity and terminal performance required for its intended distances, that's a worthwhile trade. If shortening it compromises the performance you specifically chose that cartridge to provide, you've probably gone too far.

Likewise, if you're carrying several extra inches of barrel solely to gain velocity that will never meaningfully affect your hunting, that deserves another look too.

Build backward from the job. Choose the cartridge. Choose the bullet. Determine the performance you actually need. Consider the suppressor. Then choose a barrel length that allows the complete rifle to accomplish that job.

Because the goal isn't the shortest rifle. And it isn't the fastest rifle.

It's the rifle you can carry comfortably, shoot confidently, and trust to deliver the performance you need when the opportunity arrives.

Knowledge before the purchase. Confidence after the sale.
Precision. Performance. Trust.