The Henry Big Boy Side Gate in .44 Magnum is a lever-action rifle built around a color case-hardened steel receiver and a 20-inch octagonal barrel. The side gate allows reloading one round at a time without going through the muzzle end of the magazine tube, which is noticeably faster in the field. Capacity is 10+1 rounds of .44 Magnum or .44 Special. 
 

Key Specifications 

• Model: Big Boy Side Gate 
• Caliber: .44 Magnum / .44 Special 
• Action Type: Lever Action 
• Capacity: 10+1 rounds 
• Barrel Length: 20 inches 
• Weight: 7.84 lbs. 
• Overall Length: 37.5 inches 
• Sights: Fully Adjustable Semi-Buckhorn Rear with Diamond Insert; Brass Bead Front 
• Stock Material: American Walnut 
• Receiver Finish: Color Case Hardened Steel 
   

Detailed Features 

The octagonal barrel profile is cold hammer-forged, contributing to bore consistency and longevity. The receiver is drilled and tapped, so scope mounting is straightforward. Transfer bar safety blocks the firing pin unless the trigger is pulled, which matters on a carry rifle. 
 
The .44 Magnum chambering handles deer and black bear at woods distances; .44 Special runs at lower pressure and is cheaper to shoot for practice. The case-hardened receiver finish varies slightly from rifle to rifle due to the heat treatment process, so no two look identical.

The Henry Big Boy .44 Magnum gets consistent praise for its build quality. Owners frequently mention the smooth action out of the box, the tight wood-to-metal fit, and the case-hardened receiver's visual character. The cycling feels deliberate but light, which makes it enjoyable to shoot across a session.

Accuracy is a recurring positive. Most owners report good groups at typical lever-gun distances, and the adjustable semi-buckhorn sights are functional without needing optics. The dual-caliber capability (.44 Mag and .44 Special) gets called out as genuinely useful rather than just a marketing note.

Common criticisms are weight (7.84 lbs. gets heavy over long carries) and price relative to the used market. A few owners have mentioned interest in scope mounting, which the drilled-and-tapped receiver accommodates. Overall the sentiment is strongly positive, with most dissatisfaction tied to personal fit rather than quality issues.