The Weatherby 18i is a gas-operated semi-automatic 12-gauge shotgun with a 28-inch barrel, 4+1 capacity (2+1 with magazine limiting plug), and a Realtree Timber camo finish. It is chambered for 3.5-inch shells with a chrome-lined bore and chamber. 
 

Key Specifications 

• Caliber: 12 GA 
• Barrel Length: 28 inches 
• Capacity: 4+1 (2+1 with magazine limiting plug) 
• Weight: 7 lbs. 
• Condition: New in Box 
• Finish: Realtree Timber Camo 
• Manufacturer: Weatherby 
• Model Number: IWRT1228SMG 
   

Detailed Features 

The elastomer stock absorbs recoil, which is a practical benefit when shooting heavy loads through a 7-lb shotgun over the course of a full hunting day. The chrome-lined bore and chamber accommodate 3.5-inch Super Magnum shells and simplify cleaning. 
 
Five choke tubes are included: IC, IM, M, I, and F. Having the full range from factory allows pattern adjustment for different game and distances without additional purchases. 
 
LPA fiber sights on the rib aid target acquisition in variable lighting. The full-length ventilated rib provides a consistent sighting plane across different lighting conditions. 
 
The Realtree Timber pattern is designed for hardwood environments and performs well as concealment in timber and mixed-cover hunting situations. 
 

Target Audience 

Waterfowl and upland hunters who want a semi-auto with multi-choke capability and a natural camo finish. Also suits competitive shooters who need 3.5-inch compatibility for steel shot regulations. 
 

Usage Scenarios 

• Waterfowl Hunting: 3.5-inch capability handles steel and bismuth loads for geese and ducks. 
• Upland Hunting: 28-inch barrel and five choke options make it adaptable across different upland scenarios. 
• Competitive Shooting: Semi-auto action and interchangeable chokes work well in sporting clays formats.

The Weatherby 18i Realtree Timber gets consistent praise from hunters, with some honest feedback on ammunition sensitivity.

The Realtree Timber camo is specifically praised for blending well in hardwood and mixed-timber environments. Owners who have used it in the field confirm the finish earns its designation.

Lightweight design is a positive for hunters who walk long miles. At 7 lbs it is on the lighter end for a 12-gauge semi-auto with 3.5-inch capability.

Shooting performance is generally rated well. The semi-auto cycle is smooth with standard and heavy field loads, and follow-up shots are quick. The elastomer stock is credited with making full-power loads more comfortable to shoot over an extended session.

Ammunition sensitivity is the most consistent criticism. A portion of owners report issues cycling light target or reduced-recoil loads. This is a gas-system consideration common to 3.5-inch-capable semi-autos, which are tuned for heavier loads. Most owners address this by using appropriate hunting loads and avoiding light shells.

Price is discussed in terms of value. Most owners consider it reasonably priced for the feature set, though some note alternatives at the same tier. The inclusion of five chokes is specifically valued.