Alco Slugger .510 (50 Caliber) 320-Grain Hollow Point/Hollow Back Big Bore Airgun Slugs

The Alco Slugger .510 (50 Caliber) 320-Grain Hollow Point/Hollow Back Big Bore Airgun Slug is precision-swaged for serious hunting performance. Designed for magazine or single-shot feeding, this American-made 50 caliber slug delivers high BC stability and dependable knockdown power.

Not sure on bore size? Call anytime — we’ll make sure you get it right the first time.
⚠ Verify your exact bore diameter before ordering.

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Alco Slugger .510 (50 Caliber) 320-Grain Hollow Point/Hollow Back Big Bore Airgun Slugs

Alco .510 Big Bore Airgun Slugs
. 510 Hollow Point/Hollow Back
Weight: 320-grain
Core: 100% Swaged Solid Lead Ammo (SLA)
Bore Size: 50 Caliber swaged to .510
Bullet OAL: .814
Bullet BC G1: .325
Packaged: 50 Per Box
Manufactured: USA
Calculations based on MV of 900 fps
Custom weights available on request

The Alco Bullet Slugger sets the standard in precision-swaged .510 big bore airgun slugs, delivering performance for serious hunters and airgunners who demand accuracy and consistency.

The Alco Slugger .510 (50 Caliber) 320-Grain Hollow Point/Hollow Back Big Bore Airgun Slug is a proven 50 caliber hunting airgun slug is built for reliable expansion, hard impact, and field-ready performance. As part of our Alco Big Bore line of custom-swaged .510 air rifle slugs, this round is engineered for precision and consistency. The Slugger’s unique shape with its deep hollow point and back helps reduce air resistance, to maintain velocity and energy over longer distances. The bullet has good terminal ballistics and energy transfer for more effective knockdown power. The skirt engages the lands to provide stability and accuracy The bullets will fit the Umerax Hammer and most .510 caliber magazine feed as well as single feed airguns. Hunters will appreciate their effectiveness.

Optimized for 900 FPS muzzle velocity, these airgun bullets reduce drag, improve stability, and maintain consistent flight from muzzle to impact. The result is dependable knockdown power and smooth magazine feeding in most big bore air rifles.

Precision manufactured from 100% soft swaged lead for consistency for both the hunter and competitor, each projectile provides superior bore seal and uniform engagement with the rifling, resulting in tighter groups and repeatable shot placement. The design enhances stability and minimizes velocity loss, supporting dependable accuracy across practical airgun distances.

Developed for competitive target shooting and big game hunting, every production lot is extensively accuracy-tested to ensure consistent performance and true “dead-on” results — shot after shot.

Real Craftsmanship. Precision Without Compromise.

Alco Bullets are not mass-produced. They are handcrafted in small batches with meticulous attention to detail at every stage of production. Every big bore airgun slug is precision-swaged, individually inspected, and verified to ensure exceptional uniformity in weight, diameter, and concentricity — the foundation of repeatable accuracy.

This handcrafted process allows us to prioritize precision over volume. Each projectile is a premium, custom-made slug crafted for shooters who demand measurable performance. When every thousandth of an inch matters, Alco’s dedication to consistency translates directly into tighter groups and reliable shot placement, whether on the range or in the field.

Handcrafted. Verified. Proven.

Every Alco bullet is individually hand-verified during production to ensure it meets strict performance standards. The tips are custom machined for our specifications. The bullets are formed from 100% soft swaged lead, these slugs provide superior bore seal, consistent velocity, precise rifling engagement, reduced barrel wear, and reliable expansion for humane terminal performance.

Extensively accuracy-tested before release, Alco bullets deliver repeatable results shot after shot — giving hunters and target shooters the confidence that comes from true precision craftsmanship.

Why Alco is Different

• Small-batch, custom manufacturing
• Individually inspected projectiles
• 100% soft swaged lead construction
• Designed for magazine-feed or single-feed big bore airguns
• Excellent for both precision target shooting and hunting applications
• Single-Feed Tip: When using a single-feed airgun, gently push the slug forward in the chamber until you feel resistance to properly engage the lands for optimal accuracy.

American-Made. Family-Owned. Precision-Built.

We’re a family-owned, precision shop — not a mass-production factory. Every bullet we produce is crafted with care, experience, and performance in mind. Whether you're new or experienced, we’re here to help. Call to speak directly with a bullet smith (417) 331-2100 and get the answers you need today. We answer our own phones and are ready to serve you and we’re here when you need us. Thank you.