Remington 783 Magnum vs Long-Action Magazine Length

No — a Remington 783 magnum magazine and a Remington 783 long-action magazine are not interchangeable. They are different lengths built for different cartridges: the magnum body is the longest magazine Remington built for the 783, and it holds 3 rounds, while the shorter long-action body holds 4. Order by the exact caliber stamped on your barrel, not by "Remington 783," or you'll end up with a magazine that won't seat or won't feed.

A customer once called about a 783 in .300 Win Mag that wouldn't accept a magazine sized for .270 — it wouldn't seat past a quarter inch and the floorplate wouldn't close. That mix-up happens more on the 783 than on almost any other rifle we sell parts for, because "Remington 783" isn't one magazine. It's a family of body lengths sold under a single model name, and getting the length wrong doesn't mean a minor fit issue — it means a magazine that won't feed at all.

Why the Remington 783 isn't just one magazine

Remington built the 783 across multiple action lengths to cover everything from .243 Winchester to .300 Winchester Magnum out of one receiver platform. The magazine well and the magazine body change dimensions depending on which chambering your rifle left the factory in. A magazine that drops cleanly into one 783 can jam, rattle, or refuse to lock into another — even though the two rifles look nearly identical from the outside.

Bottom line: the chambering stamped on your barrel decides your magazine, not the model name stamped on the receiver.

Long-action 783 magazines: .30-06, .270 Win, .25-06 — 4 rounds

If your 783 is chambered in .30-06 Springfield, .270 Winchester, or .25-06 Remington, you're running the long-action body, and it holds 4 rounds. This is the middle length in the lineup — longer than a short-action magazine built for .308 Winchester or .243 Winchester, but shorter overall than the magnum body below. A 4-round capacity gives you a full magazine plus one in the chamber for most hunting situations.

Magnum 783 magazines: the longest body, only 3 rounds

Here's the part that trips people up: the magnum-length Remington 783 magazine is the longest magazine body Remington built for this platform, sized for chamberings like 7mm Remington Magnum and .300 Winchester Magnum. Despite that added length, it holds 3 rounds — one fewer than the long-action magazine.

That's not Remington cutting corners. Magazine capacity is driven by how many cartridges stack side by side within the magazine's width, not just how long the box is front to back. Magnum cartridges carry a larger case head diameter and more body taper, so each round takes up more lateral space even though the magazine itself is longer. Think of it as a taller box holding wider bottles — you fit fewer of them side by side even though the box is bigger.

Long-action vs. magnum: what actually changes

None of these differences are cosmetic. A magazine that's a fraction of an inch off in length or width will fail to lock into the well, fail to feed the top round, or both — the same small-tolerance problem we cover in our guide on diagnosing Remington 783 magazine follower problems.

How to identify which 783 action length you own

Check the model and caliber information stamped on the left side of the barrel — that's the reliable source, not memory and not what a listing photo suggests. Then match that exact caliber against the magazine's product page. A correctly listed magazine states the exact chambering it's built for, not just "Remington 783." If a listing doesn't specify caliber that precisely, treat that as a red flag.

Which magazine do you need?

• Chambered in .30-06 Springfield, .270 Winchester, or .25-06 Remington (long action, 4 rounds): Remington 783 Long Action 4-Round Magazine
• Chambered in 7mm Remington Magnum or .300 Winchester Magnum (magnum long action, 3 rounds): Remington 783 Magnum Long Action Magazine
• Chambered in .308 Winchester, .243 Winchester, or 6.5 Creedmoor (short action, 4 rounds): Remington 783 Short Action Magazine
• Chambered in .223 Remington / .222 Remington (short action, 5 rounds): Remington 783 Short Action .223 Magazine
• Not sure which action length you have? Confirm the caliber on your barrel, then browse the full Remington 783 magazine collection or read the Remington 783 Magazine Guide.

Magazine capacity rules vary by state. We don’t give legal advice — check your state before you order anything above standard factory capacity on our magazine capacity laws by state page.

Once you have the correct length and capacity, keep it feeding reliably: our cleaning and lubrication guide covers what to use, and if rounds aren't feeding all the way, check spring wear first using our guide on diagnosing a worn Remington 783 magazine spring. Pushing shots past 300 yards? See our notes on optimizing 783 magazines for long-range hunting.

Frequently asked questions

Does a Remington 783 magnum magazine fit a long-action 783?

No. The magnum body is longer overall and shaped around larger-diameter magnum case heads, so it will not seat or feed reliably in a long-action 783 chambered for .30-06, .270 Winchester, or .25-06. Order the magazine listed for your specific chambering.

How many rounds does a Remington 783 magnum magazine hold?

3 rounds. It's the longest magazine body on the platform, but the wider magnum case diameter limits how many rounds stack inside compared to the long-action magazine.

How many rounds does a Remington 783 long-action magazine hold?

4 rounds, for .30-06 Springfield, .270 Winchester, and .25-06 Remington. It's shorter overall than the magnum body despite holding one more round.

How do I know if my Remington 783 is a magnum or long-action model?

Check the left side of the barrel for the stamped model and caliber, then match that exact caliber to the magazine listing. Don't rely on memory or how the rifle looks next to another 783.

Why does the magnum 783 magazine hold fewer rounds if it's longer?

Magnum cartridges have a larger case head diameter and more body taper than long-action rounds, so each round takes up more lateral space inside the stack — even with a longer overall magazine length.

Can I use a Remington 783 short-action magazine in a long-action rifle?

No. Short, long, and magnum action lengths on the 783 each use a differently sized magazine body. Check your rifle's caliber marking against the product page before ordering.

Go check the left side of your barrel, note the exact caliber, and order the magazine listed for that chambering — every Remington 783 magazine we build is made in the USA to factory-original dimensions and ships from Connecticut.

Buying for a shop, a range, or more than one rifle? See our wholesale purchasing terms for volume pricing.