RCBS 16601 Full-Length 2-Die Set for 338 Lapua Magnum - Group A Precision Reloading Tool

If you're loading for a .338 Lapua Magnum, the RCBS 16601 full-length 2-die set is a workhorse reloading die set built to handle the demands of precision rifle ammunition. This set includes everything you need to get started: a full-length sizing die and a seater die—the foundation for consistent, safe handloads across your .338 LM brass.

The full-length sizing die does the heavy lifting. It bumps the case shoulder to exact specifications (adjustable via die height), sizes the case body so it chambers smoothly, and removes the spent primer all in one station. An expander ball inside the die sizes the neck to proper tension for bullet fit. You'll need to lubricate cases before sizing—a critical step for safety and die longevity. The seater die seats bullets with precision and includes a built-in crimp ring; simply adjust die height to crimp or skip it, depending on your load data and preferences. Because .338 Lapua is a bottleneck magnum, full-length sizing is the standard approach for shooters who want repeatable chamber fit and reliable feeding.

This is the setup serious .338 LM reloaders rely on—the kind of die set that outlasts multiple barrels. Whether you're a beginner committing to handloading for the first time or a seasoned long-range shooter, RCBS full-length dies are known for holding tolerances through thousands of rounds. Start here, learn the process right, and you'll have a platform you can build on.

Key Features

• Full-length sizing die with adjustable shoulder bump for precise case preparation
• Integrated decapping pin removes spent primers during sizing
• Seater die with built-in crimp ring (crimp on or off, your choice)
• Designed specifically for .338 Lapua Magnum bottleneck cases
• Proven RCBS manufacturing for consistent die performance across thousands of rounds

Specifications

Frequently Asked Questions

What's included in this .338 Lapua die set?

You get two dies: a full-length sizing die (which also removes the spent primer via a decapping pin and sizes the case neck) and a seater die with an adjustable crimp ring. These are the core tools needed to process fired cases and load new rounds.

Do I need to lubricate cases before using the full-length sizing die?

Yes. Cases must be lubricated before full-length sizing to protect both the brass and the die, and to ensure smooth operation through the press.

Can I choose whether to crimp or not crimp with the seater die?

Yes. The seater die has a built-in crimp ring that you control by adjusting the die height in your press—raise it to skip the crimp, lower it to apply one.

Is this die set suitable for a beginner reloader?

Absolutely. Full-length 2-die sets are the recommended starting point for new reloaders. Learn proper die setup, case preparation, and technique with this set before exploring specialty dies. Many shooters use the same full-length die set through multiple barrels without wearing it out.