Most caliber debates force a choice. This one doesn't: a .357 Magnum revolver fires .38 Special all day long, because the .357 is literally a lengthened .38 Special case. That single fact reorganizes the entire buying decision — so let's walk through what each cartridge actually does, and why the two-cartridge revolver is the best deal in handgunning.
Same bore, different case, different world
The .357 Magnum was created in the 1930s by stretching the .38 Special case about an eighth of an inch and loading it to dramatically higher pressure. The bullets are identical in diameter. The extra case length exists mostly as a safety interlock: a full-power .357 round physically will not chamber in a .38 Special cylinder, while .38s drop into a .357 cylinder with room to spare. One direction is always safe, the other is impossible by design — the rare firearms question with a built-in guardrail.
Downrange, the difference is anything but academic. The magnum runs the same bullet weights hundreds of feet per second faster, which buys flatter trajectory, harder impact, and a very different experience on both ends of the gun: more blast, more flash, and recoil that turns a pleasant range session into work — especially in the compact revolvers people actually carry.
What each one is actually for
.38 Special: the volume cartridge
The .38 is soft-shooting, accurate, quiet by centerfire revolver standards, and cheap enough to shoot in quantity. It's the cartridge you build skill with — which is why nearly every serious revolver shooter, whatever's stamped on their barrel, burns mostly .38 at the range. It also remains a fully legitimate defensive cartridge in modern loadings, particularly the +P class we cover in our +P guide.
.357 Magnum: the delivery cartridge
The magnum is what you load when the job outranks comfort: woods carry, home defense in a full-size gun, hunting inside its envelope. Its reputation as a fight-stopper is earned. Its cost is controllability — full-house magnum from a snub-nose is an experience most shooters fire twice and quietly stop practicing, and a defensive load you won't practice with is a spec-sheet decision, not a real capability.
Why the .357 revolver wins the purchase decision anyway
Given all that, the buying logic lands in a strange place: even shooters who intend to feed a gun 95% .38 Special are usually better served buying the .357 version. You pay a modest premium for a slightly stronger gun, and you get the entire decision deferred forever — practice with .38, load whatever the task demands, change your mind by opening the cylinder. A compact like the Taurus 605 embodies the idea: five shots of .357 capability that will spend most of its life comfortably digesting .38s.
The honest exceptions: ultralight alloy snubs, where even .38 +P is snappy and a .357 chambering is mostly a number on the barrel; and dedicated target shooters, for whom a .38-only gun gives up nothing they'll ever use. Everyone else should buy the longer cylinder.
Feeding the pair
The two-cartridge system works best run deliberately. Buy .38 Special range ammo in bulk for volume work — our range ammo guide sorts the field. Choose one defensive or field load in .357 Magnum — or a .38 +P if the gun is light — and buy enough of it to actually pattern and practice, because magnum loads rarely print to the same point of aim as your .38 practice load. Confirm the shift, log it, and re-confirm whenever the carry load changes.
One habit the pairing demands: scrub the chambers. Shooting quantities of shorter .38s leaves a carbon ring at the case mouth position that can make longer .357 rounds sticky to chamber and extract. A bronze brush and a minute per chamber after .38-heavy sessions keeps the magnum option genuinely available — see our maintenance guide for the routine.
Bottom line
This isn't a versus at all. Buy the .357 revolver, shoot the .38 Special by the box, and keep the magnum's answer loaded for the questions that deserve it. Two cartridges, one cylinder, no compromise — it's the best arrangement in handgun ammunition, and it's been hiding in plain sight for ninety years.
Frequently asked questions
Can I shoot .38 Special in a .357 Magnum revolver?
Yes, always — the .357 is a lengthened .38 Special, so .38s chamber and fire safely in any .357 revolver. The reverse is impossible by design: .357 rounds are too long to chamber in a .38 Special cylinder.
Is .38 Special enough for self-defense?
Modern .38 Special defensive loads, particularly +P offerings, remain a widely trusted choice, especially from guns you can shoot accurately and practice with. Shot placement from a controllable gun beats power you flinch from.
Does shooting .38 Special hurt a .357 revolver?
No harm to the gun — but volume .38 shooting builds a carbon ring in each chamber where the shorter case ends, which can make .357 rounds chamber and extract stiffly until the chambers are brushed clean. Routine cleaning solves it completely.