The CONTOUR #5 25710CM5 – Douglas .257 1-10 Twist CM #5 Contour Ultra Rifled Barrel is a premium match-grade barrel blank engineered for serious rifle builders and precision shooters who demand consistent accuracy from their custom .25-caliber projects. Built from high-quality 4140 chrome moly steel and finished in Douglas’s renowned Double XX Ultra Rifled pattern, this #5 contour blank is ideal for rebarreling hunting rifles, varmint rigs, or precision target guns chambered in popular .257-caliber cartridges—when installed and chambered by a qualified gunsmith. Brownells UK+3Brownells Italia+3Crow Wholesale+3
Match-Grade Douglas Double XX Barrel Blank
Douglas has been building precision barrels for decades, and their Double XX series is widely respected among custom builders for consistent accuracy and superb internal finish. MidwayUSA+3Brownells Italia+3Primary Tactical+3
Key performance highlights:
Match-grade manufacturing from one of the U.S.’s oldest barrel makers
Button-rifled bore for an extremely smooth finish and uniform lands and grooves Brownells Italia+1
Groove diameter and straightness held to tight tolerances—approximately 0.0005"—to support outstanding downrange consistency Brownells Italia+2Brownells Italia+2
All barrels are stress-relieved to help maintain point of impact and reduce warping under heat cycles Brownells Italia+2Brownells UK+2
For the gunsmith or advanced shooter planning a serious custom build, this blank gives you a proven starting point for accuracy-focused projects.
.257 Caliber with 1:10 Twist – Versatile .25-Cal Setup
This CONTOUR #5 25710CM5 model is configured as a .257 caliber barrel blank with a 1:10" twist rate, a classic and versatile pairing for many .25-caliber bullet weights when chambered appropriately. Brownells Italia+2Frisco Guns+2
Core specs:
Caliber: 25 Caliber (.257)
Twist Rate: 1 turn in 10" – well-suited for a broad range of typical .25-cal hunting and varmint projectiles
Style: Ultra Rifled – Douglas’s premium rifling pattern for smooth, consistent engagement Brownells Italia+2Brownells UK+2
When chambered correctly by a professional, this twist and caliber combination supports accurate, repeatable performance in a wide range of lawful hunting and target roles.
#5 Contour – Balanced Rigidity & Carry Weight
The #5 contour gives this Douglas blank a substantial profile that balances stiffness with manageable weight. It’s an excellent choice for:
Precision hunting rifles where cold-bore and follow-up shots both matter
Varmint or predator rigs where you may fire moderate strings without excessive heat whip
General-purpose accuracy builds that don’t need the bulk of a heavy benchrest contour Brownells+2Krieger Barrels+2
The #5 contour offers more rigidity than lightweight sporter profiles, helping to reduce barrel vibration and shot-to-shot dispersion, yet it’s still practical to carry in the field.
4140 Chrome Moly Steel – Durable, Gunsmith-Friendly
This CONTOUR #5 Douglas barrel blank is made from 4140 chrome moly steel, a long-proven alloy in performance rifle barrels. Brownells Italia+2Brownells Schweiz+2
Material advantages:
Excellent combination of strength, hardness, and machinability
Well-suited to threading, chambering, and crowning by qualified gunsmiths
Compatible with a variety of finishes (such as bluing or certain coatings) to match your build’s aesthetic and corrosion-resistance needs
Because this is a blank, it arrives unthreaded and unchambered, ready to be turned into a fully custom barrel by a competent professional. Brownells Italia+2MidwayUSA+2
Ultra Rifled Interior – Button-Rifled Smoothness
Douglas’s Ultra Rifled process uses button rifling to create a smooth, uniform bore that minimizes fouling and helps maintain consistent velocities. Brownells Italia+2Brownells UK+2
Rifling characteristics:
Uniform groove depth and land height for predictable bullet engagement
6 grooves used on calibers from .22 through .338, including this .257 model, supporting proven accuracy potential Brownells Italia+2Brownells Italia+2
Smooth internal finish that cleans more easily than many rougher, mass-produced barrels
For shooters chasing tight groups and reliable first-shot hits, these details add up to real-world performance benefits.
Barrel Blank Dimensions & Finish Potential
While specific finished dimensions are listed in Douglas contour charts, Douglas notes that unturned blanks are typically: Brownells Italia+2shilen.com+2
That extra material gives your gunsmith room to:
Turn the blank to final contour
Cut and crown to desired finished length
Thread and chamber for your chosen .257-caliber cartridge
Fit and time the barrel precisely to your action
The result is a barrel tailored not only to your cartridge choice but to your specific action, stock, and application.
Ideal Applications – Custom Hunting & Precision Builds
The CONTOUR #5 25710CM5 Douglas .257 1-10 Twist CM #5 Contour Ultra Rifled Barrel is an excellent foundation for:
Custom hunting rifles in appropriate .257-caliber chamberings, where reliable accuracy and good carry weight matter
Varmint and predator rifles that see moderate strings of fire at distance
Range and target rifles where you want match-grade consistency from a classic steel barrel blank
As always, all chambering, threading, and installation work should be performed by a qualified gunsmith, and the completed rifle must be used only in lawful, safe contexts according to all applicable regulations.
Key Features & Specifications – CONTOUR #5 25710CM5
If you’re searching for a premium .257-caliber #5 contour barrel blank with a 1:10 twist and proven Douglas Double XX Ultra Rifled quality, the CONTOUR #5 25710CM5 is a formidable foundation for your next custom build—delivering the precision, consistency, and craftsmanship that discerning shooters and gunsmiths expect from a true match-grade barrel.
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