The Howa M1100 Gamepro is a bolt-action rimfire rifle chambered in .17 HMR. It has an 18-inch barrel, 10-round capacity, and weighs 6.3 lbs. The stock is OD Green and the action comes scope-ready with a compatible mounting system for optics like the GamePro 4-12x40mm. 
 

Key Specifications 

• Caliber: .17 HMR 
• Barrel Length: 18 inches 
• Capacity: 10 rounds 
• Weight: 6.3 lbs 
• Finish Color: OD Green 
• Manufacturer: Howa 
• Model: M1100 Gamepro 
• Type: Bolt Action Rifle 
   

Features 

The 18-inch barrel is a reasonable length for .17 HMR — the cartridge achieves its best velocity in the 18-22 inch range, so there's no meaningful performance penalty from the shorter profile. The bolt cycles smoothly and the feeding is reliable with the 10-round detachable magazine. The rifle ships without a scope but is ready for one without additional machining or adapters. 
 
At 6.3 lbs. the M1100 carries easily. The OD Green stock is synthetic, which handles weather better than wood for field use. 
 

Common Uses 

The .17 HMR caliber has a flat trajectory and low recoil, which makes it well-suited for varmint work — prairie dogs, ground squirrels, and similar small targets at ranges out to around 150 yards. It's also a natural fit for casual target shooting and plinking where the low recoil makes extended sessions comfortable.

Howa M1100 Gamepro owners in .17 HMR tend to be a satisfied group, with accuracy being the most consistently praised attribute.

The bolt action and barrel combination produces tight groups at typical varmint ranges. Most users report the rifle performs at or above what they expected for the price, and .17 HMR's inherently flat trajectory makes reading the results straightforward — you either hit or you didn't, and most report more of the former than the latter.

Build quality gets consistent praise. The OD Green synthetic stock takes field use without complaint, and the action feels solid. The Howa reputation for quality control carries into the M1100 line — it's not a surprise that this one holds up.

The .17 HMR caliber itself generates most of the substantive discussion: the flat trajectory and minimal recoil make it fun to shoot and effective on small game, though some users note that wind sensitivity increases past 100 yards compared to heavier centerfire options.

Value is a strong point. Multiple reviews compare it favorably to CZ and Savage rimfire bolt-action options in the same price bracket, with most concluding that Howa delivers comparable or better accuracy per dollar.

Customization interest is modest. Some owners add aftermarket stocks or scope upgrades, but the rifle functions well enough stock that most don't feel compelled to modify it. The only recurring complaint is weight or balance relative to lighter hunting-specific designs.