The Weatherby 307 Alpine MDT Carbon is a bolt-action rifle in 7MM PRC with a 22" cold hammer-forged barrel, threaded 5/8x24, and a 1-in-8" twist rate. It weighs 6.6 lbs, light for a 7MM PRC platform, and holds 3+1 rounds. The carbon fiber chassis keeps weight down without sacrificing rigidity, which makes a real difference when you're carrying it over rough country. 
 

Key Specifications: 

• Manufacturer: Weatherby 
• Family: 307 Series 
• Model: 307 Alpine MDT Carbon 
• Type: Rifle 
• Action: Bolt Action 
• Caliber/Gauge: 7MM PRC 
• Barrel Length: 22" 
• Capacity: 3 + 1 rounds 
• Weight: 6.6 lbs. 
• Thread Pattern: 5/8x24 
• Special Feature: Threaded Barrel (Drilled/Tapped) 
• Rate-of-Twist: 1-in-8" 
   

Detailed Features 

 
The 22" cold hammer-forged barrel gives consistent bore geometry, which matters for repeatable accuracy at distance. The 1-in-8" twist stabilizes the heavier 7MM PRC projectiles that make the cartridge worth shooting in the first place. 
 
The threaded muzzle (5/8x24) accepts suppressors or muzzle brakes without modification. The MDT carbon chassis is adjustable and stiff, no flex under load, and it interfaces cleanly with aftermarket accessories if you want to go further. 
 
At 6.6 lbs in 7MM PRC, this is genuinely light. Most rifles in this caliber with comparable barrel lengths run 7.5-8.5 lbs before optics.

Owners of the Weatherby 307 Alpine MDT Carbon in 7MM PRC focus heavily on two things: accuracy and weight. The precision engineering delivers on paper. Tight groups at long range are the most consistently reported outcome. The carbon chassis earning its keep on weight is the second theme; hunters in mountainous terrain specifically call this out.

Recoil with 7MM PRC is described as manageable, less punishing than some comparable cartridges, which keeps the rifle pleasant to shoot in volume. Build quality gets high marks. Materials feel quality, and the fit is tight without being finicky.

Price is the main friction point. The 307 Alpine MDT Carbon sits at the premium end, and some buyers question the gap versus other precision rifles at lower price points. Those focused on the specific combination of light weight and 7MM PRC capability tend to justify the cost; those shopping more broadly sometimes find the value case harder to make. Customer service experiences with Weatherby are mixed in owner threads, mostly positive, with occasional complaints about parts availability.