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Starline has built a reputation among handloaders for turning out some of the most uniform brass on the market, and this .38-55 Winchester offering is no exception. These cases arrive unprimed and ready for your bench, cut to the standard 2.080" Winchester case length so they drop into classic .38-55 and .38-55 Ballard chambers without a fuss. For a cartridge that can be notoriously picky, starting with quality brass takes a lot of the guesswork out of the equation.
The standout feature here is the case mouth. Starline runs a thinner mouth wall, averaging about .0072", which is noticeably slimmer than standard Winchester brass. That extra clearance is a real advantage when you're working with larger diameter cast bullets or dealing with a tight chamber neck paired with a generous bore. If you've slugged your barrel and landed on a fat .380 or .381 bullet, this is the brass that gives you room to seat it.
These take a large rifle primer and use a rimmed, straight-wall design. New brass benefits from a full-length size, a trim to length, and a quick chamfer and deburr before that first loading so everything feeds and seats cleanly. The .38-55 case runs a bit long by nature, so it's worth confirming your chamber dimensions before trimming anything down. Many loaders find they can neck size only after the first firing, and a factory crimp die helps keep things tidy on lever gun rounds where crimping in the groove matters for feeding.
The .38-55 is a piece of American rifle history, serving in the Winchester 1894, Marlin lever guns, and single shot target rifles for well over a century. It's also the parent case behind the .30-30 and .32 Winchester Special. Whether you're feeding an original lever action, a modern reproduction, or a single shot built for cast bullet accuracy, this Starline brass gives you a dependable foundation to build your loads on.
These cases run the standard 2.080" Winchester case length, which falls in the 2.076" to 2.082" range. That's the shorter of the two lengths Starline offers for the .38-55, and it fits most standard Winchester-spec chambers. If your rifle is chambered for the longer 2.125" brass, you'll want that version instead, so it's worth confirming your chamber before ordering.
The .0072" average mouth wall is thinner than standard Winchester brass, which gives you extra room to seat larger diameter bullets. That's a big help in rifles with tight chamber necks or oversized bores where fat cast bullets would otherwise struggle to chamber. For a cartridge as finicky as the .38-55, that bit of extra clearance can be the difference between a round that chambers and one that doesn't.
No, these are unprimed cases that take a large rifle primer. They're meant for handloaders who want to assemble their own ammunition from the ground up. As with any new brass, giving them a full-length size, trim, chamfer, and deburr before the first loading will keep everything running smoothly.
The .38-55 has a long history in American lever guns and single shots, including the Winchester 1894, Marlin lever actions, and various single shot target rifles. It's also the parent case for the .30-30 and .32 Winchester Special. Whether you're loading for an original antique or a modern reproduction, slugging your bore first will help you pick the right bullet diameter to pair with this brass.
| UPC | 810742025939 |
|---|---|
| Manufacturer | |
| Manufacturer Part Number | 3855EUP50 |
| Caliber/Gauge | .38-55 Winchester |
| Length | 2.076"-2.082" |
| Product Type | Rifle |
| Quantity | 50 Per Bag |
| Style | Large |
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