Winchester
Winchester 231
One of the longest-running and most widely used handgun powders, aimed at standard-pressure target and general-purpose loads across most common handgun cartridges.
Official Winchester load data →
Specifications
| Manufacturer | Winchester |
|---|---|
| Product family | Winchester |
| Status | Currently produced |
| Application | pistol |
| Grain form | spherical |
| Composition | double-base |
| Temperature stable | Not marketed as temperature-stable |
| Flash suppressant | Yes |
| Burn-rate position | 32 of 198 (fastest = 1) — what this means |
| Typical cartridges | 38 Special, 45 ACP, 9mm Luger |
Winchester canister propellants are spherical BALL POWDER products made in the USA; the round kernels meter precisely through volumetric powder measures. Winchester cites consistency, clean burning and low flash. Listed as subsonic-capable and not listed as temperature stable. It is generally understood to be the same propellant Hodgdon sells as HP-38.
Burn rate
Fast handgun speed, in the same band as Hodgdon HP-38.
Chart agreement: consistent; widely published as the same powder as Hodgdon HP-38 - Wolfe/LoadData lists each as the other's equivalent. Ranked by: Hodgdon, Vihtavuori, Shooters World, Wolfe/LoadData.
Powders charted near it — neighbours on the chart are not substitutes, and adjacency tells you nothing about what charge either one takes:
- Accurate No. 2 (position 29)
- Ramshot Zip (position 30)
- Hodgdon HP-38 (position 31)
- Alliant 20/28 (position 33)
- Vihtavuori N32C Tin Star (position 34)
- Winchester WinClean 244 (position 35)
What reloaders say about it
Unverified community anecdote. The following is a summary of what handloaders report in public forums. It is not manufacturer information, it has not been tested, it may be wrong, and it contains no load data by design. Treat it as colour, not guidance.
The community treats HP-38 and W231 as the same product under two labels, sourced to a direct statement from the manufacturer and a recorded interview — the difference being brand licensing cost. This is one of the few equivalences r/reloading treats as settled rather than rumor.
- treated as the same powder under two brand names
- practical benefit is doubling your shelf options when hunting for powder
- published data from different manuals may still differ slightly, which users attribute to lot variation
Availability: Reported as generally available; one of the two labels is often on the shelf when the other is not.
Reported cautions:
- Users specifically caution that very old load data may predate the products converging, so vintage data should not be cross-applied.
- Even for a manufacturer-confirmed equivalence, users note published data from different sources still differs — a reminder to use data for the powder in front of you.
Consensus level: widely held. Drawn from thread 1.
Sources
Other Winchester powders
Verify the charge, not just the recipe
Good data gets you a safe starting point. It does not tell you what actually went into the case on stroke 340 — a bridged measure, a double charge, a squib. That is what an RCM Laser Powder Check is for.