Product Features & Specifications

Enhancing Precision and Reliability: The Lee 90831 Factory Crimp Rifle Die for .220 Swift

For serious reloaders, hunters, and competitive shooters who demand the utmost precision and reliability from their ammunition, the journey to perfection often involves meticulous attention to every detail. When crafting cartridges for high-performance calibers like the lightning-fast .220 Swift, ensuring consistent bullet pull and preventing bullet setback are paramount. This is where specialized tools, like the Lee 90831 Factory Crimp Rifle Die for .220 Swift, become indispensable. This isn't just another die; it's a precision instrument designed to elevate your reloading game, ensuring that every round you produce mirrors the consistency of factory-loaded ammunition, and often surpasses it.

Understanding the Need for a Rifle Crimp in .220 Swift Ammunition

The .220 Swift is renowned for its blistering velocity and flat trajectory, making it a favorite for varmint hunting and long-range precision shooting. However, its high-performance nature means that even subtle inconsistencies in ammunition can significantly impact accuracy and safety.

So, why is crimping your rifle cartridges important, especially for a caliber like the .220 Swift?

• Preventing Bullet Setback: One of the most critical reasons for crimping is to prevent "bullet setback." This occurs when the bullet is pushed deeper into the case during feeding, recoil, or handling. Setback can dramatically increase chamber pressure, potentially leading to dangerous conditions, especially with fast-burning powders. For powerful cartridges, the inertia from recoil can also cause bullets in the magazine to creep forward or backward. A proper crimp securely holds the bullet in place, mitigating these risks.
• Ensuring Consistent Powder Burn: A consistent and uniform crimp helps to regulate the initial resistance the bullet experiences before it starts moving down the barrel. This consistent resistance, often referred to as "bullet pull," directly influences the ignition and burn rate of the powder. A more consistent powder burn translates to more consistent muzzle velocities, which is a cornerstone of superior accuracy and reduced group sizes. For reloaders aiming for sub-MOA precision, achieving this consistency is non-negotiable.
• Improving Feeding Reliability: For rifles that feed from a magazine, especially semi-automatic or lever-action firearms, a secure crimp prevents the bullet from being dislodged or shifting during the feeding cycle. This ensures smoother, more reliable chambering, reducing the likelihood of malfunctions such as nose-dives or failures to feed.
• Protecting Bullet Integrity: While less common, heavy recoil can, over time, cause the bullet to loosen its grip in the case if not adequately secured. A light, uniform crimp adds an extra layer of security, preserving the integrity of your carefully crafted ammunition.

What Makes the Lee Factory Crimp Die Unique? The Collet Advantage

Unlike traditional roll crimps or taper crimps, which can sometimes deform bullets or buckle case shoulders if not applied perfectly, the Lee Factory Crimp Die employs a unique collet-style mechanism. This innovative design offers several distinct advantages that set it apart as a preferred choice for discerning reloaders:

1. Independent of Case Length: A common challenge with traditional crimp dies is their dependency on consistent case length. Variations in case length can lead to inconsistent crimps, with longer cases being over-crimped and shorter cases receiving insufficient crimp. The Lee Factory Crimp Die circumvents this entirely. Its collet design crimps the case mouth around the bullet without being affected by the overall case length. This means less sorting of brass by length and more consistent results across your batch.
2. Crimps the Bullet, Not the Case Mouth: The collet fingers gently squeeze the case mouth onto the bullet, rather than simply turning it inward or applying pressure against the shoulder. This "factory-like" crimp is incredibly secure yet minimizes case mouth deformation. This gentle action prolongs case life by reducing wear and tear on the brass.
3. No Cannelure Required: Many bullets designed for rifle cartridges feature a "cannelure" – a shallow groove around the bullet designed to accept a roll crimp. With the Lee Factory Crimp Die, the presence or absence of a cannelure is irrelevant. It will provide a secure crimp on any bullet, whether it has a cannelure or not, offering reloaders greater flexibility in bullet selection.
4. Enhanced Concentricity: By applying uniform pressure around the entire circumference of the case mouth, the collet system helps maintain bullet concentricity. This is critical for accuracy, as a concentric bullet travels more predictably down the bore, contributing to tighter groups.
5. Works on All Rifle Bullets: Whether you're loading traditional jacketed bullets, lead-free projectiles, or even specialized competition bullets, the Lee Factory Crimp Die for .220 Swift will provide a reliable and consistent crimp.

How the Lee 90831 Factory Crimp Die Works Its Magic

The operation of the Lee Factory Crimp Die is surprisingly simple yet incredibly effective. It consists of a die body, a collet, and a crimping punch.

When the ram of your reloading press raises the shell holder (with a seated cartridge) into the die:

• The cartridge enters the die body.
• As the cartridge continues upward, the case mouth pushes against the collet fingers, which are tapered on the inside.
• The upward pressure causes the collet fingers to be forced inward, gently squeezing the case mouth tightly around the seated bullet.
• The amount of crimp is adjustable by simply turning the die body up or down in your press, allowing you to fine-tune the crimp to your specific needs and bullet type.

This mechanism ensures a uniform, segment-free crimp that effectively prevents bullet movement while minimizing case stress. It's a testament to Lee Precision's commitment to delivering high-quality, user-friendly reloading tools that empower reloaders to achieve superior results.

Who Benefits from the Lee 90831 Factory Crimp Rifle Die?

This specific die, tailored for the .220 Swift, is a must-have for a wide range of reloaders:

• Precision Shooters: For those chasing the smallest possible groups at the range or in competition, every factor influencing consistency matters. The enhanced bullet pull consistency provided by this die contributes directly to reduced velocity deviations and tighter shot groups.
• Varmint Hunters: The .220 Swift is a premier varmint cartridge. Hunters need reliable ammunition that performs consistently in varying field conditions. The crimp ensures bullets stay put, even when jostled in a rifle magazine during stalks.
• High-Volume Reloaders: If you load hundreds or thousands of rounds of .220 Swift, the efficiency and consistency offered by the Lee Factory Crimp Die save time and reduce frustration compared to trying to achieve a perfect crimp with less forgiving methods.
• Semi-Automatic Rifle Owners: While the .220 Swift is primarily a bolt-action cartridge, any reloader who processes cases for a semi-automatic rifle in another caliber (and Lee makes similar dies for many calibers) understands the absolute necessity of a reliable crimp to prevent feeding issues and bullet setback from recoil. The principles apply universally.
• Reloaders Seeking Factory-Like Performance: If your goal is to produce ammunition that meets or exceeds the reliability and consistency of commercial factory loads, adding a dedicated crimp die like the Lee Factory Crimp Die is a crucial step.

Integrating the Lee Factory Crimp Die into Your Reloading Process

The Lee 90831 Factory Crimp Rifle Die for .220 Swift is designed to be used as a separate step in your reloading process, typically after the bullet seating step. While some seating dies offer an integrated crimp, a dedicated crimp die allows for finer control and often a superior, more consistent crimp, without compromising bullet seating depth.

It's compatible with any standard reloading press that accepts 7/8-14 thread dies. Reloaders will typically perform full-length resizing, decapping, priming, powder charging, bullet seating, and then, as a final step, run the loaded cartridge through the Factory Crimp Die. This sequential approach ensures each operation is performed optimally.

Common Questions About Reloading and Crimp Dies Answered

"Do I always need to crimp my rifle ammunition?"
Not always, but it's highly recommended for many applications, especially with high-recoil cartridges, ammunition intended for semi-automatic firearms, or if you're seeking the highest levels of velocity consistency. For light-recoiling bolt-action rifles, many precision shooters prefer to omit the crimp entirely, relying solely on neck tension for bullet retention. However, for the .220 Swift, given its high velocity and typical hunting/varmint applications, the benefits of a crimp often outweigh any perceived drawbacks.

"Can I use the Lee Factory Crimp Die with cast bullets?"
Absolutely. The collet design is gentle enough that it won't deform or shave lead from cast bullets, making it an excellent choice for those who load lead projectiles for reduced loads or specialized applications in their .220 Swift.

"How does the Lee Factory Crimp Die differ from a roll crimp or taper crimp?"

• Roll Crimp: This crimp rolls the case mouth into a cannelure on the bullet. It's very strong but requires a cannelured bullet and precise case length. Over-crimping can buckle the case shoulder.
• Taper Crimp: This crimp removes the flare from the case mouth and applies a slight taper, primarily used for handgun cartridges that headspace on the case mouth or certain rifle cartridges like the .223/5.56. It's a lighter crimp, mainly for bullet retention and feeding.
• Lee Factory Crimp (Collet-Style): As described, it squeezes the case mouth around the bullet using a collet, independent of case length or cannelure, providing a secure, uniform crimp without distorting the bullet or buckling the case.

"What other equipment do I need to use this die effectively?"
You'll need a standard reloading press (e.g., single-stage, turret, or progressive press with 7/8-14 threads), a shell holder appropriate for the .220 Swift, and your other standard reloading dies (resizing, seating). This crimp die is typically the final step after bullet seating.

The Lee Precision Legacy: A Brand You Can Trust

Lee Precision has been a cornerstone of the reloading community for decades, known for producing innovative, high-quality, and affordable reloading equipment. Their commitment to making reloading accessible and effective for everyone is evident in products like the Factory Crimp Die. When you choose Lee Precision, you're investing in reliability, precision, and a company with a long-standing reputation for supporting reloaders worldwide. The Lee 90831 Factory Crimp Rifle Die for .220 Swift exemplifies their dedication to engineering tools that truly make a difference in your handloading endeavors.

Whether you're new to reloading or a seasoned veteran, optimizing your ammunition for the .220 Swift can unlock new levels of performance and confidence. The Lee Factory Crimp Die addresses critical aspects of ammunition consistency, leading to more accurate shots and a safer reloading experience.

All Lee Precision products, including the Lee 90831 Factory Crimp Rifle Die for .220 Swift, are readily available at DEGuns.com. DEGuns is committed to providing reloaders with the finest tools and components to support their passion for precision shooting and responsible firearm ownership.

Technical Specifications & Key Information

Feature	Description
UPC	015813908313
Product Name	Lee Factory Crimp Rifle Die .220 Swift
Manufacturer	Lee Precision
Caliber	.220 Swift
Die Type	Collet Crimp Die
Thread Size	7/8-14 (Standard)
Function	Applies a "factory-like" crimp to rifle cartridges to enhance bullet retention and consistency.
Key Benefit	Prevents bullet setback, improves consistent powder burn, enhances accuracy, prolongs case life.
Compatibility	Works with all standard reloading presses.
Special Feature	Crimp is independent of case length and does not require a cannelure on the bullet.