The Henry Big Boy .45 Colt Side Gate is the full-size version of the Big Boy series, with a 20-inch octagon barrel and 10+1 capacity. Model number H006GC. At 8.68 lbs and 38.5 inches overall, it's heavier and longer than the carbine variant but provides three more rounds and a longer sight radius. 
 

Key Specifications 

• Model Number: H006GC 
• Action Type: Lever Action 
• Caliber: .45 Colt (LC) 
• Capacity: 10 Rounds (+1 in the chamber) 
• Barrel Length: 20 inches 
• Overall Length: 38.5 inches 
• Weight: 8.68 lbs 
• Receiver Material: Polished Hardened Brass 
• Stock Material: American Walnut 
• Sights: 
• Front: Brass Bead 
• Rear: Fully Adjustable Semi-Buckhorn with Diamond Insert 
• Safety Feature: Transfer Bar 
   

Detailed Features 

The side loading gate on the right side of the receiver allows loading and topping off without cycling through the traditional front tube method. Both loading methods remain available. The transfer bar safety prevents the firing pin from moving unless the trigger is deliberately pulled through the full stroke. 
 
The octagon barrel is a visual signature of the Big Boy line and contributes to a long sighting radius. The adjustable semi-buckhorn rear sight can be set for different loads. 
 
The polished brass receiver and American walnut stock are consistent across the Big Boy lineup. 
 

Usage 

The .45 Colt at full rifle velocity from a 20-inch barrel is effective on deer at moderate ranges. The 10+1 capacity gives it more rounds than the carbine for extended range sessions or hunting situations where quick follow-up shots matter.

The Henry Big Boy .45 Colt Side Gate gets consistent praise for build quality -- the brass receiver and walnut stock finish stand out in a market where many lever-actions use synthetic or lower-grade wood. The lever action cycles smoothly, which comes up frequently as a positive.

Accuracy at practical pistol-caliber ranges is well regarded. Most owners report satisfying results on paper and on game. The .45 Colt chambering is popular for its versatility across lighter and heavier loads.

Criticism centers on weight and price. At 8.68 lbs, the rifle is on the heavier side for a lever-action that some buyers planned to carry all day. The price is regularly discussed -- Henry rifles cost more than some competing options, and buyers weigh the quality and brand against that gap.

Some owners note that the 10+1 capacity, while generous for the caliber, is lower than modern semi-automatic platforms. Ammunition availability and price fluctuations come up in regional discussions.