The CONTOUR #5 – Douglas .338 1-10 Twist SS #5 Contour Ultra Rifled Barrel (Stock #237933105) is a premium stainless steel, match-grade barrel blank engineered for serious hunters, long-range shooters, and gunsmiths who demand top-tier accuracy from their .338 caliber builds. Featuring Douglas’ renowned Double XX quality, a #5 medium-heavy contour, and a 1:10 twist, this Ultra Rifled barrel is a superb foundation for custom .338 rifles chambered for cartridges like .338 Win. Mag., .338-06, and similar .338-based rounds. friscoguns.com+1
Douglas Double XX Quality – Built for Precision
Douglas Double XX premium-grade barrels have an excellent reputation among custom builders and precision shooters. They are manufactured with extremely tight tolerances and meticulous attention to detail, making them a trusted choice for rebarreling projects where accuracy truly matters. Brownells UK
Key performance characteristics:
Button-rifled for an exceptionally smooth bore finish that helps minimize fouling and improves consistency shot to shot. Brownells UK
Groove diameter and straightness held to about 0.0005" tolerance, supporting excellent concentricity and long-range precision. Brownells UK
In .338 caliber, the barrel features six rifling grooves, a proven configuration for stability and accuracy with a wide range of .338 bullets. Brownells UK
Stress-relieved after rifling to reduce internal stresses that can shift POI as the barrel heats up. Brownells UK
For builders who won’t settle for “good enough,” Douglas Double XX barrels continue to be a go-to standard.
.338 Caliber, 1:10 Twist – Ideal for Versatile .338 Loads
This CONTOUR #5 model is a .338 caliber barrel blank with a 1:10 twist rate—a popular and versatile twist choice for medium to heavy .338 bullets used in hunting and precision applications. friscoguns.com+1
Why 1:10 twist in .338 is so useful:
Provides excellent stability for a broad range of medium- to heavy-weight bullets commonly used in .338 hunting and long-range cartridges.
Well-suited to big-game hunting loads and long-range match bullets, giving builders the flexibility to tailor the rifle to their specific role.
Helps maintain accuracy at extended distances where bullet stability is critical.
If you’re planning a custom .338 for elk, moose, or long-range steel, this twist rate offers a proven sweet spot.
#5 Contour – Balanced for Accuracy and Carry
The #5 contour is a medium-heavy profile that gives you a smart balance between stiffness and weight. friscoguns.com+1
Contour advantages:
Increased rigidity over lightweight sporter barrels, which helps shrink groups and reduce barrel whip.
Enough mass to manage heat better during strings of fire, improving shot-to-shot consistency.
Still manageable for field carry—ideal for precision hunting rifles, long-range rigs, and tactical/target builds that may also be carried in the field.
With an approximate shipping weight of around 3.7 lbs as a blank, this #5 contour is right at home in serious big-game and long-range platforms. friscoguns.com+1
Stainless Steel Construction – Durability & Corrosion Resistance
This CONTOUR #5 barrel blank is made from stainless steel, offering enhanced resistance to the elements and easier maintenance compared to basic chrome-moly options. friscoguns.com+1
Benefits of stainless construction:
Excellent corrosion resistance, ideal for rifles exposed to harsh weather, snow, rain, or humidity.
Easier to keep clean and bright inside the bore, which can aid in long-term accuracy.
A great match for stainless or Cerakote-finished actions and components in custom builds.
For backcountry hunts, wet climates, or high-round-count range work, a stainless Douglas barrel gives you long-term durability with top-tier performance.
Ultra Rifled Style – Smooth Bore, Consistent Performance
Douglas labels this model as “Ultra Rifled”, a style associated with their premium Double XX barrel line. friscoguns.com+1
What you can expect from the Ultra Rifled style:
Very smooth internal finish from button rifling, which can reduce copper fouling and simplify cleaning.
Consistent rifling geometry along the length of the bore for more predictable velocities and dispersion.
A bore and groove profile optimized for accuracy-focused builds, whether you’re shooting factory ammo or handloads.
This makes the CONTOUR #5 an excellent choice for custom rifles where precision is a primary goal.
Ready for Your Gunsmith – Not Threaded or Chambered
Like other high-end barrel blanks, the CONTOUR #5 .338 1-10 Twist SS #5 Contour Ultra Rifled Barrel comes unthreaded and unchambered, allowing your gunsmith full control over the final configuration. Brownells UK
Gunsmithing-friendly features:
Supplied as a blank with finished contour dimensions; unturned blanks from Douglas typically arrive slightly oversized and a bit longer than final spec to allow precise fitting. Brownells UK
Your smith can cut the barrel to length, machine the tenon, thread it, and chamber it for your preferred .338 cartridge and action.
Perfect for rebarreling existing rifles or building a custom gun from the ground up.
This flexibility ensures your finished rifle is tailored to your exact performance and dimensional requirements.
Ideal Applications
Because of its caliber, twist, contour, and construction, this CONTOUR #5 .338 SS barrel is an outstanding choice for:
Custom .338 hunting rifles targeting elk, moose, and other large game.
Long-range and steel-gong rifles where .338 cartridges are used for extended distances.
Precision rebarrel projects on magnum actions needing a rugged, accurate barrel.
High-quality builds where the shooter wants Douglas Double XX accuracy with the added benefits of stainless steel. Brownells UK+2Primary Tactical+2
Pair it with a quality action, stock, and trigger, and you’ll have the heart of a serious precision .338 rifle.
Key Specs – CONTOUR #5 .338 1-10 Twist SS Ultra Rifled Barrel (237933105)
If you’re searching for a high-end .338 stainless barrel blank with a proven track record in accuracy and durability, the CONTOUR #5 – Douglas .338 1-10 Twist SS #5 Contour Ultra Rifled Barrel (237933105) is an outstanding foundation for your next custom build or rebarrel project. With Double XX quality, a versatile 1:10 twist, and a robust #5 contour, it’s engineered to help your rifle reach its full potential in the field and on the range. Ammunition for Sale+3friscoguns.com+3Brownells UK+3
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