Winchester
Winchester 571
A slow-burning shotshell BALL POWDER used for heavy magnum field and waterfowl loads before it left the catalogue.
Discontinued. Canisters still circulate, but the maker no longer produces it — and load data for it may be withdrawn or archived.
Official Winchester load data →
Specifications
| Manufacturer | Winchester |
|---|---|
| Product family | Winchester |
| Status | Discontinued |
| Application | shotshell |
| Grain form | spherical |
| Composition | double-base |
| Typical cartridges | 12 Gauge, 10 Gauge |
Discontinued. Winchester and Hodgdon no longer list this powder among current Winchester canister products and it does not appear on Hodgdon's current relative burn rate chart. No manufacturer product page remains; use only data from an archived manufacturer manual.
Data confidence
We flag entries we could not fully verify rather than presenting them as solid:
- Discontinued — no live manufacturer product page; details drawn from archived or secondary manufacturer material.
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.