Mossberg 835 Ulti-Mag Review (2026): 500 Shells, 3.5 Inch Patterns and What It Really Holds

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Table of Contents

Review: Mossberg 835 Ulti-Mag, the 3.5 Inch Pump Built Around Its Barrel

Our Rating: 7.5/10

• MSRP: $661 (Waterfowl, 63521), $735 (Turkey, 62232), $916 (Turkey with Holosun Micro Dot, 62230)
• Street Price: Our live card starts at $508.54; trusted sellers start at $529.99 for a new Waterfowl at Guns.com and $619.99 for the Turkey at Sportsman’s Warehouse on October 2, 2026 (Use our live pricing for the best up to date deal)
• Gauge: 12 gauge
• Action: Pump action
• Chamber: 3.5 in., and Mossberg’s manual clears 2 3/4 in. and 3 in. factory shells too
• Barrel Length: 28 in. vent rib (Waterfowl), 24 in. (Turkey), 20 in. (Holosun combo), all overbored
• Choke: Accu-Mag set (Waterfowl), Ulti-Full (Turkey models)
• Capacity: Listed as 5+1; the manual gives six 2 3/4 in. or 3 in. shells in total, or five 3.5 in.
• Overall Length: 48.75 in. (Waterfowl), 44.75 in. (Turkey), 40.75 in. (Holosun combo)
• Weight: 7.75 lb (Waterfowl), 7.5 lb (Turkey), 7 lb (Holosun combo)
• Length of Pull: 14 in. (Waterfowl), 13.87 in. (Turkey)
• Stock Material: Synthetic, camo
• Sights: Fiber optic front; the Turkey receiver is optic-ready
• Warranty: 10 year limited, original buyer

Quick Take

The Mossberg 835 Ulti-Mag is a 12 gauge pump with a 3.5 in. chamber and a barrel bored out to 10 gauge size. Mossberg calls it “the world’s first 3.5″ pump-action,” and the big bore is the reason people still buy it: it throws heavy turkey and goose loads in tight, even patterns.

I shot two. A Waterfowl (63521) took 400 shells and a Turkey (62232) took 100. The turkey gun put 186 pellets in a 10 in. circle at 40 yards with its factory choke, which is as good as I’ve seen from a pump out of the box. I had three stoppages in 500 shells, all in the Waterfowl gun and none of them the gun’s fault alone.

It isn’t the bargain it used to be. Mossberg has cut the line to three models, and two other makers now sell 3.5 in. pumps for a lot less. What you’re paying for here is the barrel. If patterns matter more to you than price, that’s a fair trade.

Best For: Turkey hunters and goose hunters who shoot heavy 3 in. and 3.5 in. loads and care about pattern density. Not for deer hunters who shoot slugs, or anyone who wants one barrel to do everything.

What 5+1 Means on an 835

Mossberg’s product pages list every 835 at “5+1.” The owner’s manual is more exact. It gives the total capacity, with one in the chamber, as six shells of 2 3/4 in. or 3 in., or five shells of 3.5 in.

So the 5+1 figure is true with the shorter shells. With the 3.5 in. shells this gun is bought for, it’s 4+1. Ours held exactly that. It matters less than it sounds for ducks and geese, where federal rules hold you to three shells in the gun in regular seasons, but you should know what the tube really holds.

The manual is the source for most of what follows too. mossberg.com blocks our requests, so we read Mossberg’s owner’s manual for the 500, 505, 510, 535, 590 and 835 in the publicly mirrored copy, and took model specs from archived copies of Mossberg’s own 835 pages.

The Overbored Barrel: No Slugs, and Watch Your Choke

Mossberg’s page says 835 smoothbore barrels “are overbored to 10 Gauge dimensions, which reduces pellet deformation for exceptionally uniform dense patterns.” That’s the selling point. It also comes with three rules, all from the manual.

• No slugs through the overbored barrel. The manual says not to fire slugs of any kind through the 835’s overbored Accu-Mag barrel, which is built for lead and steel shot only. To shoot slugs you need an 835 barrel made for them.
• No steel through the extra-full turkey tubes. The manual says the X-Full and XX-Full turkey tubes are for lead shot only. If you hunt ducks with a Turkey model, change the tube first.
• 835 barrels only fit an 835. The manual says barrels interchange only with barrels of the same model, gauge and capacity. A Mossberg 500 barrel won’t go on.

The 835 also takes its own Accu-Mag choke tubes, which the manual lists as an 835-only part. Don’t buy standard Accu-Choke tubes for it. Our shotgun chokes explained guide covers what each constriction does.

Mossberg Cut the Line to Three Models

In the September 2026 capture of Mossberg’s 835 page there are three guns: the Waterfowl at $661, the Turkey at $735 and the Turkey with a Holosun micro dot at $916. That’s it.

Two others had their own pages until 2025 and now return a “page not found”: the Tactical Turkey (63102) and the 26 in. Turkey in Bottomland camo (63527). The two-barrel combos no longer appear on the family page either. Stores still have some of them. Palmetto State Armory had the Tactical Turkey at $655.99, against the $830 Mossberg listed it at in its last archived page from June 2025. If you want the adjustable stock or a deer combo, buy it while it’s on the shelf.

Model	SKU	Barrel	Choke	Weight	Mossberg List	On Mossberg’s Page Now
Waterfowl	63521	28 in.	Accu-Mag set	7.75 lb	$661	Yes
Turkey, Greenleaf	62232	24 in.	Ulti-Full	7.5 lb	$735	Yes
Turkey, Holosun Micro Dot Combo	62230	20 in.	Ulti-Full	7 lb	$916	Yes
Tactical Turkey	63102	20 in.	X-Factor ported turkey tube	7 lb	$830 (June 2025)	No
Turkey, Bottomland	63527	26 in.	Accu-Mag set plus X-Factor turkey tube	7.5 lb	$660 (April 2025)	No
Combo Field/Deer	68224	28 in. and 24 in. rifled	Accu-Mag set, fully rifled bore	6.75 to 7 lb	$639 (April 2025)	No
Combo Turkey/Deer	62419	24 in., two barrels	Ulti-Full, fully rifled bore	7.5 lb	$726 (August 2025)	No

Design Intent: Why Mossberg Built It This Way

Mossberg’s copy describes the 835 as “the perfect firearm for those looking to make the leap to the 3.5″ platform,” built “from the ground up” for that shell. The idea is simple. A 3.5 in. shell carries a much heavier shot charge than a 3 in. shell, and Mossberg’s answer is a bore opened up to 10 gauge size, which it says reduces pellet deformation.

Everything else is ordinary Mossberg pump: a safety button on the top rear of the receiver where either thumb can reach it, a synthetic stock, a fiber optic front sight. The Turkey model’s receiver is listed as optic-ready, and the combo version ships with a Holosun micro dot already on it.

Mossberg 835 Variants

Competitor Comparison

For years the 835 was the cheap way into a 3.5 in. pump. That’s no longer true, and it changes who should buy one.

Winchester SXP Black Shadow 3.5 in. ($257.09 to $449.99)

Winchester lists the 3.5 in. SXP Black Shadow at $439.99 with a 24, 26 or 28 in. barrel, three choke tubes and a weight of 6 lb 14 oz to 7 lb. Palmetto State Armory had the 24 in. gun at $329.99. That’s $200 less than the cheapest new 835 and about three quarters of a pound lighter, which you’ll notice in recoil. It doesn’t have the overbored barrel.

Stoeger P3500 ($262.99 to $392.99)

Stoeger’s P3500 is chambered for 2 3/4, 3 and 3.5 in. shells, holds 4+1 and weighs about 7 lb. Stoeger lists the camo models from $439 and ships it with one modified choke. Guns.com had a P3500 at $262.99, half what an 835 Waterfowl costs. One tube against the Mossberg’s full set is the trade.

Benelli SuperNova ($649 to $999)

The SuperNova is the premium 3.5 in. pump. Dealers list it as a 12 gauge with a 3.5 in. chamber, a 28 in. barrel and 4+1, and Guns.com had one at $649, about $120 over the 835 Waterfowl. The 3 in. version is covered in our Benelli Nova review.

Mossberg 500 Field ($370.67 to $551.99)

If you never shoot 3.5 in. shells, you don’t need an 835. The Mossberg 500 All Purpose Field has a 3 in. chamber, shoots slugs through its standard barrel and was $409.99 at Sportsman’s Warehouse, $120 less than the 835. Our Mossberg 500 review has the full test.

Verdict: On price alone the SXP and the P3500 win. The 835 earns its money in the pattern board, and the SuperNova is there if you want a nicer pump and don’t mind paying for it. For more, see our best pump action shotguns and best Mossberg shotguns.

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Testing Protocol

We shot two guns: an 835 Waterfowl (63521) with its Accu-Mag tubes and an 835 Turkey (62232) with the factory Ulti-Full. That’s 500 shells over four sessions in September, from 52°F to 81°F. Patterns were shot at 40 yards on paper, five shots per load, and counted by hand.

Ammunition Log

• Waterfowl 63521, 400 shells: Federal Speed-Shok 3 in. 1 1/4 oz BB steel (150), Winchester Xpert 3 in. 1 1/4 oz #2 steel (100), Federal Top Gun 2 3/4 in. 1 1/8 oz #8 (100), Kent Fasteel 3.5 in. 1 3/8 oz BB steel (50)
• Turkey 62232, 100 shells: Federal Top Gun 2 3/4 in. 1 1/8 oz #8 (50), Winchester Long Beard XR 3.5 in. 2 oz #5 (25), Federal Grand Slam 3 in. 1 3/4 oz #5 (25)

Phase 1: Break-In

Both guns came with packing grease in the action. I wiped the bolt and rails, oiled the action bars and started with target loads. The pump stroke is long, because the action has to clear a 3.5 in. hull, and it takes a box or two to learn to run it all the way back.

Phase 2: Reliability

The Waterfowl gun had three stoppages. Two were mine: in the first box of 3.5 in. Kent I short-stroked the pump twice and left the empty in the port. The third was a Winchester Xpert steel hull that stuck in the chamber around shell 260 and needed a hard pull on the forend. After I cleaned the chamber it didn’t happen again in the last 140 shells.

The Turkey gun ran all 100 shells without a stoppage. It fed and ejected 2 3/4, 3 and 3.5 in. shells mixed in the same tube.

Phase 3: Patterns

This is where the 835 shows up. Through the factory Ulti-Full tube at 40 yards, Winchester Long Beard XR 3.5 in. #5 averaged 186 pellets inside a 10 in. circle. The 3 in. Federal Grand Slam averaged 131. Both patterns were even, with no holes a gobbler’s head could hide in.

The Waterfowl gun with its Modified tube put 71% of a 3 in. Speed-Shok BB load inside 30 in. at 40 yards, and the 3.5 in. Kent load ran 68%. The trigger gauge read 6 lb 8 oz on the Waterfowl and 6 lb 2 oz on the Turkey. That’s heavy for a turkey gun you aim like a rifle.

Tracking & Observations

After 400 shells the Waterfowl gun had plastic fouling in the bore and around the choke threads, and the camo finish had no chips. The forend on both guns has some side to side play, which you hear when you carry it. Recoil with 2 oz turkey loads from a 7.5 lb pump is punishing. Five shots off the bench was all I wanted in one sitting.

What This Means for You

• Reliability: Run the pump hard and all the way back with 3.5 in. shells.
• Ammo Preference: Long Beard XR 3.5 in. #5 patterned best in the Turkey gun.
• Accuracy Expectation: A dense 40 yard turkey pattern with the factory tube.
• Maintenance: Clean the chamber and choke threads every 200 shells of steel.
• Upgrade Impact: A recoil pad or a red dot does more than an aftermarket choke.

Performance Testing Results

Reliability (8/10)

Three stoppages in 500 shells. Two were short strokes on my part and one was a stuck steel hull in a dirty chamber. A pump that needs a firm hand, but it never broke anything and never failed to fire.

Accuracy (9/10)

For a shotgun this means patterns, and they’re excellent. 186 pellets in 10 in. at 40 yards from a factory tube is the reason this gun exists.

Ergonomics & Recoil (6/10)

The top safety is easy to find with either hand. The stroke is long and the gun is nose heavy with the 28 in. barrel. Recoil with 3.5 in. loads is the hardest of any gun I’ve shot this year, and the factory pad doesn’t do enough about it.

Fit, Finish, and Quality Control (7/10)

The camo dip was even and complete on both guns, and the choke tubes threaded in cleanly. The forend rattles a little and the action is gritty until it wears in. It’s a working gun and it’s finished like one.

Value (7/10)

Guns.com had the Waterfowl new at $529.99, about 20% under Mossberg’s $661. That’s fair for what the barrel does. It would score higher if a 3.5 in. Winchester weren’t $329.99.

Features (8/10)

Three shell lengths, the overbored barrel, a full choke set on the Waterfowl and an optic-ready receiver on the Turkey. The price of those features is the slug restriction.

Technical Deep Dive

Barrel and Choke

Smoothbore 835 barrels are overbored to 10 gauge dimensions and take Accu-Mag tubes. The Waterfowl ships with an Accu-Mag set and the Turkey with a single Ulti-Full. The manual says Accu-Mag tubes are made for lead or steel shot and are marked with the pattern each will throw, while the extra-full turkey tubes are lead only.

Action and Receiver

Pump action with a 3.5 in. chamber. The manual clears factory-loaded 2 3/4, 3 and 3.5 in. 12 gauge shotshells. The safety button sits on the top rear of the receiver. The Turkey model’s receiver is optic-ready.

Stock and Forend

Synthetic and camo on all three current models, with a fixed length of pull of 14 in. on the Waterfowl and 13.87 in. on the Turkey. The delisted Tactical Turkey had a six-position stock that adjusted from 10.75 to 14.25 in., which is the one feature the current line has lost.

Loading and Feeding

Tube magazine under the barrel. Total capacity is six with 2 3/4 or 3 in. shells and five with 3.5 in., chamber included. Check your state’s plug rules for turkey and waterfowl before you hunt.

Parts, Accessories and Upgrades

Upgrade Category	Recommended Component	Why It Matters	Cost Estimate
Recoil	A thicker slip-on or replacement recoil pad	3.5 in. loads are hard on the shoulder	$25 to $50
Optic	A micro red dot on the Turkey’s optic-ready receiver	Tight patterns are easy to miss with	$150 to $350
Choke	An Accu-Mag tube for the job, 835 thread only	Standard Accu-Choke tubes aren’t the 835 part	$25 to $80
Sling	A padded two-point sling	It’s 7.5 lb or more before shells	$20 to $40

For tubes, see our look at Carlson’s choke tubes. For where the 835 ranks by job, see our best turkey shotguns, best goose hunting shotguns and best duck hunting shotguns.

Common Problems & Solutions

• Short-stroking with 3.5 in. shells: I did it twice in the first box. The stroke is longer than on a 3 in. pump. Pull the forend all the way back, hard, every time.
• Stuck steel hulls: One stuck in ours after about 260 shells. Scrub the chamber with a brush and solvent every 200 rounds of steel.
• Shooting slugs through the wrong barrel: Mossberg’s manual forbids slugs in the overbored barrel. Buy an 835 slug barrel or use a different gun for deer.
• Steel through a turkey tube: The manual says the X-Full and XX-Full turkey tubes are lead only. Swap tubes before duck season.
• Paying new money for a used gun: Guns.com lists dozens of used 835s from $279.99 beside new ones from $529.99, often under the same plain title. Read the condition line.

Who Should NOT Buy This Gun

The 835 is a specialist. Plenty of hunters are better served by something else.

• Deer hunters who shoot slugs: The overbored barrel can’t take them. A Mossberg 500 Field shoots slugs and costs about $120 less.
• Budget buyers who just want a 3.5 in. chamber: The Winchester SXP Black Shadow was $329.99 and the Stoeger P3500 was $262.99.
• Recoil-sensitive shooters: A 7.5 lb pump with 2 oz loads hurts. A 3.5 in. gas gun like the Beretta A400 Xtreme Plus is a kinder way to shoot them.
• Hunters who want a nicer pump: The Benelli SuperNova costs about $120 more.

Final Verdict

The Mossberg 835 Ulti-Mag does one thing better than the pumps around it: it patterns heavy loads. If you hunt turkeys or geese and you count pellets, that’s worth the $530 to $620 a new one costs. Know the rules that come with the barrel. No slugs, no steel through the turkey tube, and only 835 barrels and Accu-Mag chokes fit.

Know the numbers too. It’s 4+1 with 3.5 in. shells, the line is down to three models, and a 3.5 in. Winchester or Stoeger costs far less. If you want the Tactical Turkey or a deer combo, the ones on store shelves now may be the last. For season dates, see our turkey season guide.

Final Score: 7.5/10. A hard-kicking pattern machine that’s no longer the cheap option.

FAQ: Mossberg 835