Chiappa SA 1873 Black Thunder 5.5" — Budget Single-Action .44 Mag
Chiappa's SA 1873 Black Thunder is a single-action revolver built on the classic 1873 pattern, chambered in .44 Magnum with a 5.5-inch barrel. It's aimed squarely at shooters who want a full-power .44 Mag single-action without paying Ruger Redhawk or Freedom Arms money — a price bracket that's historically been thin on double-action-free options.
What Makes It Different
The interesting part isn't the action type — single-action .44 Mags have existed since the Blackhawk — it's where Chiappa has positioned the Black Thunder on price. A 5.5" barrel is the sweet spot for .44 Magnum: long enough to let slower-burning magnum powders finish combustion before the bullet exits, short enough to still carry and holster like a working gun rather than a hunting specialty piece. Barrel length matters more for magnum revolver cartridges than for most rifle rounds, because a meaningful fraction of the powder charge is still burning when the bullet passes the forcing cone on shorter barrels — cut the barrel down and you lose real velocity, not just a rounding error.
Coming in under the price of a Redhawk puts the Black Thunder in competition with used-market guns rather than other new ones, which is the more interesting comparison for a buyer actually shopping this segment.
Penetration Test
We ran a standard .44 Magnum load — 240gr JHP at roughly 1,180 fps from the 5.5" barrel — through the BallisticEngine drywall barrier model at typical home-defense distance, to see how a full-power magnum round behaves against an interior wall.
| Load | Barrier | Distance | Result |
|---|---|---|---|
| .44 Magnum 240gr JHP | Drywall, 0.50" | 3 yards | Full penetration |
Exit velocity: 1,147 fps (impact 1,177 fps). Residual energy after the drywall: 687 ft·lbs of the 738 ft·lbs it arrived with — the barrier absorbed just 6.9%. A single sheet of gypsum is essentially transparent to a full-power magnum revolver load.
As with any hollow point through drywall, the round does not expand: gypsum packs the cavity and the bullet exits near-intact at 98% mass retention. Whatever is behind that wall meets a 240-grain projectile still carrying more energy than most 9mm loads produce at the muzzle.
How It Compares
Against the Ruger Redhawk — the reference point for mid-priced .44 Mag single-actions — the Black Thunder trades some fit-and-finish and long-term durability reputation for a materially lower price. For a shooter who wants the ballistics of a full-power .44 Mag 5.5" barrel without the Redhawk's price tag, it's a straightforward value play rather than a spec-sheet differentiator.
Want to run .44 Magnum against a different barrier or distance? BallisticEngine models 18 barrier materials from first-principles physics.
Run a Penetration Scenario