Benelli vs Beretta Semi-Autos: Inertia vs Gas, Explained

Same family, different philosophy

Here's a fact that ends a lot of gun-counter arguments early: Benelli has been owned by Beretta since 2000. Benelli Armi started in 1967 in Urbino, Italy, as an offshoot of the Benelli motorcycle business, and today both nameplates sit inside the same group. So when two guys argue Benelli versus Beretta, the profits go to the same place either way.

What is genuinely different is how the guns work. Benelli built its reputation on an inertia-driven action. Beretta's semi-autos are gas-operated. Neither is "the right way." They are two solid engineering answers with different trade-offs, and the right one for you depends on what you shoot, how often, and how much cleaning you'll put up with.

This is an editorial comparison built from published sources and retailer specifications, not a hands-on test. Where a number appears, it comes from a listing or reference we link below.

How an inertia gun cycles

An inertia action uses the recoil of the shot itself. Inside the bolt there's a stiff spring between the bolt body and the locked bolt head. When the gun fires, the whole shotgun moves back into your shoulder. The heavy bolt body, thanks to inertia, tends to stay where it is for a split second while the gun and bolt head move rearward around it. That compresses the spring. The spring then pushes the bolt body back, which unlocks the bolt head and cycles the action.

The appeal is simplicity. No gas is tapped from the barrel, so there's no gas piston, no gas ports and no hot carbon blown back into the action. The mechanism lives mostly in the bolt. That's why inertia guns earn a reputation for running clean and for being easy to keep going in mud, rain and cold.

The same design creates two rules you need to know:

• It needs enough recoil. The load has to produce enough rearward kick to compress the spring. Very light target loads may not cycle reliably.
• The gun must be free to recoil. Reference descriptions of the system note that the shotgun has to move to work, and that a big increase in the gun's weight (heavy add-ons) can reduce the energy available to cycle.

Translation: an inertia gun likes stout loads, a normal shoulder mount, and a stock configuration that isn't loaded down with heavy accessories.

How a gas gun cycles

A gas-operated shotgun taps a small amount of the expanding propellant gas through ports in the barrel. That gas pushes a piston, which drives the action rearward to eject the empty and chamber the next shell.

Because part of the shot's energy goes into working the action, and because the cycle stretches the recoil impulse over a slightly longer time, gas guns are widely known for a softer-feeling push than a fixed-breech gun of the same weight. That's the core reason gas semi-autos dominate clay courses where people shoot hundreds of shells a day.

The price is maintenance. Gas carries carbon and plastic residue into the piston area, and that has to be cleaned. A neglected gas gun is the most common reason a "reliable" semi-auto starts to short-cycle. Beretta's current A400 and A300 listings mention features aimed at softening recoil, such as the Kick-Off system on several models, but the basic deal holds: gas guns trade some cleaning time for comfort.

Side by side

The Benelli lineup in plain English

M2 Field

The M2 is Benelli's general-purpose field gun, offered in 12 and 20 gauge. It's the one most people picture: synthetic or camo, compact, simple, ready for ducks, turkeys and upland birds with a choke change. If you want one semi-auto that rides in a truck and sees every season, the M2 is the Benelli most hunters look at first.

Montefeltro

The Montefeltro is the more traditional, walnut-stocked option, also offered in 12 and 20 gauge. It suits upland hunters who carry a gun for miles and fire it a few times a day, which is exactly where the light inertia action shines.

Super Black Eagle

The Super Black Eagle line, now in its third generation, is Benelli's waterfowl workhorse, built to handle shells up to 3.5 inches. If you hunt ducks and geese in sleet with heavy steel loads, this is the model family aimed at you.

Ammunition Depot's semi-auto shotgun listings didn't show Benelli models when we checked, so look at local dealers too. You can browse current semi-automatic shotguns at Ammunition Depot and compare them against what local shops carry.

The Beretta lineup in plain English

A300 (Outlander and Ultima)

The A300 is Beretta's value gas gun and the most common entry point into the brand. The 12 gauge model listed at Ammunition Depot has a 28-inch vent-rib barrel, a 3-inch chamber, 3+1 capacity, an aluminum receiver, the Kick-Off recoil reduction system, MobilChoke tubes, a 14.25-inch length of pull, and a listed weight of 7.62 pounds.

A400 (Xtreme Plus, Upland, Xcel)

The A400 is Beretta's step-up gas family, split by job. The Xtreme Plus models are 3.5-inch waterfowl guns. The Upland 20 gauge listed at Ammunition Depot is a 28-inch, 3-inch-chambered 2+1 gun at a listed 6.7 pounds with three Optima-Choke HP tubes, a light gas gun meant for walking. The Xcel Multitarget is a clays gun; the 30-inch 12 gauge listing shows a 4+1 capacity and 7.9 pounds. We dissect that one in our A400 Xcel review.

For high-volume clays, the A400 Xcel Multitarget 30-inch is the dedicated target choice in the family.

Which one for which hunter

The waterfowler in bad weather

Either works, which is why both brands are common in duck blinds. Inertia guns get the nod from hunters who hate cleaning a gas system full of marsh grit. Gas guns get the nod from hunters who shoot a lot of heavy 3.5-inch steel and want it to hurt less. Ask yourself which you dislike more: recoil or cleaning.

The upland walker

Light weight matters most when you carry for miles and shoot seconds. The Montefeltro and the A400 Upland both chase that goal from opposite directions. Fit is the tiebreaker; mount both if you can.

The clays shooter

Gas, generally. High round counts, light target loads and a desire for minimal shoulder fatigue all point toward a gas gun. An inertia gun can shoot clays fine with loads stout enough to cycle it, but it isn't optimized for a 300-shell weekend.

The new shooter or recoil-sensitive shooter

Gas. Softer felt recoil keeps new shooters practicing instead of flinching. A 20 gauge gas gun is one of the friendliest semi-autos you can hand someone.

The one-gun owner

If one shotgun has to hunt everything and you'll clean it maybe twice a year, an M2 is hard to argue with. If it has to hunt and shoot a lot of clays, an A300 or A400 likely serves you better. Our all-purpose shotgun guide walks through that "one gun, three jobs" decision.

Loads, cleaning and break-in

Whatever you buy, read the manual's load guidance before the first range trip. Semi-autos of both types can be fussy with the very lightest shells, particularly when new and tight. Most owners run a box or two of full-power 12 gauge or 20 gauge field loads through a new gun before deciding it "won't cycle."

Cleaning routines differ:

• Inertia: keep the bolt and its spring clean and lightly lubricated per the manual, and don't over-oil in freezing weather.
• Gas: clean the piston, gas ports and magazine tube area regularly; carbon there is the usual cause of short-cycling.

The bottom line

Store your shotgun unloaded and locked, keep ammunition separate, and check your state's hunting rules for magazine plugs and shell limits before the season.

Editorial note: This is an independent editorial overview built from manufacturer specifications, retailer listings and published sources. We have not performed hands-on testing of the products discussed, and nothing here is a performance guarantee. Verify specifications, compatibility and the law where you live.

Affiliate disclosure: Some links on this page are affiliate links to Ammunition Depot. We may earn a commission if you buy through them, at no extra cost to you. Our editorial choices are not influenced by commissions. Check current price, stock and specifications directly with the retailer.