Starline 45 Auto brass (Large Pistol Primer) – 100 ct

This Starline auto brass large pistol primer case is the trusted foundation for building accurate, reliable .45 Auto handloads, and this 100 count box gives pistol reloaders a clean, uniform starting point. When you want cases that last through many firings, Starline auto brass large pistol primer stock is the name serious handloaders keep coming back to.

What this Starline auto brass large pistol primer case is and who it is for

You get 100 pieces of new .45 ACP brass cut for a large pistol primer, ready to prime, charge, and seat. Designed by John Browning, the .45 Auto, also known as the .45 ACP, has been adopted at one point or another by several governments as their official military handgun chambering. It remains hugely popular in the United States as a personal defense and target cartridge, which keeps demand for quality cases high.

Anyone who shoots a 1911, a modern polymer 45, or a big bore revolver that accepts .45 Auto with moon clips will appreciate a supply of fresh, consistent brass.

Why reloaders choose this Starline auto brass large pistol primer

• Brand new .45 Auto cases with a large pistol primer pocket for classic component compatibility.
• Tight, uniform dimensions that promote reliable feeding in autoloaders.
• Consistent case wall thickness for even neck tension and steady velocities.
• Durable brass known for accepting many reloads when sized and trimmed correctly.
• A convenient 100 count box for small batch load development or plinking stock.
• A dependable base for target, competition, and everyday practice loads.

Specifications and how it performs

This box holds 100 new .45 ACP cases built around a large pistol primer, the traditional primer size for this venerable cartridge. The .45 Auto thrives on quality brass because its low pressure, straight walled case is easy on components and rewards uniformity with excellent accuracy. Manufactured by Starline, a company respected across the reloading world, these cases give handloaders the repeatable case capacity and neck tension that turn a decent load into a great one.

About the .45 ACP and reloading straight walled brass

John Browning designed the .45 Auto around 1905, and it was adopted with the Model 1911 pistol to become one of the most enduring service cartridges ever fielded. It runs at a modest pressure ceiling, which is a big part of why it is so easy on brass and so pleasant to reload. That low pressure, combined with a straight walled case, means cases can be loaded many times when they are sized and trimmed sensibly. The large pistol primer pocket in these cases suits classic load data and the wide selection of large pistol primers reloaders already keep on the bench.

Building good .45 ammunition is refreshingly simple. Resize and deprime, prime with a large pistol primer, drop a carefully weighed charge, and seat your bullet to an overall length that feeds reliably in your pistol. Finish with a light taper crimp that removes the case flare without crushing the case, since the .45 headspaces on the case mouth and an over crimp can hurt both function and accuracy. Trim only if cases grow beyond specification, which is rare for such a low pressure round. With a little attention, this brass will cycle through your press for many loading sessions and deliver the accuracy that made the cartridge a legend.

Practical use, care, and compatibility

Prep is simple. Inspect each case, resize and deprime, then prime with a large pistol primer, charge, and seat your chosen bullet with a light taper crimp to preserve reliable feeding. Trim only if cases grow beyond spec, which is rare for the low pressure .45 Auto, and your brass will serve for many loading cycles. Keep finished ammunition and empty cases in a dry, labeled container away from solvents. For loading trays, ammo boxes, and storage to keep your reloading corner tidy, explore our gear and storage category. Loaded with care, this Starline brass helps the .45 Auto deliver the smooth, accurate performance that made it a legend.

For a reloading run built on brass you can trust, this Starline auto brass large pistol primer case is the right call.

Ships direct to your door, no FFL required.