The CONTOUR #5 7MM9CM5 is the Douglas 7mm 1-9 Twist CM #5 Contour Ultra Rifled Barrel, a premium match-grade barrel blank from one of America’s most respected barrel makers. Part of the renowned Douglas Double XX Ultra Rifled line, this 7mm (.284) chrome moly #5 contour barrel is button-rifled, stress-relieved, and held to extremely tight tolerances—designed for gunsmiths and precision rifle builders who demand top-tier accuracy from their 7mm builds. Brownells+2crowwholesale.com+2
If you’re planning a 7mm custom rifle, long-range hunting rig, or precision target build, the Douglas 7MM9CM5 is an outstanding foundation for your next rebarrel project.
Douglas Double XX – Ultra Rifled Match-Grade Quality
Douglas’s Double XX Ultra Rifled barrels are widely known for their accuracy and consistency:
Button rifled for exceptional bore smoothness and reduced fouling, which helps maintain consistent velocities and easier cleaning. Brownells+1
Groove diameter and straightness held to about 0.0005", supporting tight groups when properly chambered and fit. Brownells+2Primary Tactical+2
No post-rifling straightening—Douglas relies on precise manufacturing and stress relief instead of forcing barrels straight, helping preserve uniform internal geometry. Brownells+1
All barrels are fully stress-relieved to promote stable point-of-impact, even as barrel temperature changes during extended strings of fire. Brownells+2Primary Tactical+2
These characteristics are why Douglas Double XX barrels are a favorite choice for high-accuracy rebarreling projects across a wide range of calibers.
7mm (.284) Caliber with 1:9 Twist – Versatile for Modern 7mm Loads
The 7MM9CM5 barrel blank is configured for 7mm / .284" caliber cartridges with a 1:9 twist rate: Brownells+2crowwholesale.com+2
A 1:9 twist in 7mm is well-suited for stabilizing a wide range of popular bullet weights, making it an excellent option for:
Long-range hunting bullets commonly used in cartridges like 7mm-08 Rem, 7x57, and other 7mm-based rounds.
Heavier, high-BC projectiles favored in precision and extended-range applications (within the usual 7mm bullet weight envelope).
With the right chambering and load development, this twist rate gives your 7mm build the flexibility to run everything from mid-weight hunting bullets to heavier long-range projectiles.
#5 Contour – Medium-Heavy Profile for Precision & Field Use
As the name implies, this barrel uses Douglas’s #5 contour, a medium-heavy profile that balances stiffness and practicality: Brownells+2Primary Tactical+2
Contour: #5 – heavier than lightweight sporter profiles, providing increased rigidity and improved heat handling.
Excellent choice for precision hunting rifles, varmint/predator rigs, and general-purpose 7mm precision builds where you want real accuracy without the extreme weight of a bull barrel.
This contour helps maintain consistent barrel harmonics and point of impact over longer shot strings, while still being reasonable to carry in the field.
4140 Chrome Moly Construction – Strong, Finish-Friendly Steel
The 7MM9CM5 is manufactured from 4140 chrome moly steel, a proven barrel material: Brownells+2Primary Tactical+2
Material: 4140 Chrome Moly Steel
Excellent strength and toughness for high-pressure 7mm cartridges.
Ideal substrate for traditional finishes such as hot blue or Parkerizing, as well as modern coatings like Cerakote after machining is complete.
Designed for a long service life with proper care and cleaning.
If you prefer a classic steel barrel with excellent durability and a wide range of finishing options, chrome moly is an ideal choice.
Ultra Rifled, Stress-Relieved – Accuracy-Focused Manufacturing
Every Douglas Ultra Rifled barrel blank, including the 7MM9CM5, is built with precision at every step:
Button-rifled Ultra Rifled bore for a smooth interior surface that helps reduce fouling and makes cleaning easier. Brownells+1
Stress-relieved after rifling to minimize internal stresses that can cause unwanted POI shifts as the barrel heats up. Brownells+2shootingsurplus.com+2
Six-groove rifling in .22 through .338 caliber barrels, including this 7mm option, for a proven balance of accuracy and longevity. Brownells+1
When properly chambered, crowned, and installed by a competent gunsmith, these features give your rifle true match-grade potential.
Barrel Blank Configuration – Non-Threaded, Unchambered, #5 Contour
The CONTOUR #5 7MM9CM5 is sold as a barrel blank, ready for full custom work:
Barrel Style: Non-threaded, not chambered, not crowned—ready for your gunsmith to cut to length, chamber, and thread as needed. Brownells+2Primary Tactical+2
Caliber: 284 / 7mm
Twist: 1-9
Contour: #5
Material: Chrome Moly Steel (Douglas Double XX line) Brownells+2crowwholesale.com+2
Douglas notes that unturned blanks are slightly oversized in diameter and about 1.5" longer than finished dimensions, giving your smith room to dial in the perfect final profile. Brownells+1
Because it arrives as a blank, the 7MM9CM5 is ideal for custom chambering in your 7mm cartridge of choice, whether you’re building around a favorite long-action, short-action, or custom receiver.
Ideal Applications for the 7MM9CM5 #5 Contour Barrel
Thanks to its 7mm caliber, 1:9 twist, and #5 contour, this Douglas barrel blank is perfectly suited for:
Long-range hunting rifles – Take advantage of high-BC 7mm bullets and stable barrel harmonics for ethical shots at distance.
Precision 7mm target or steel rifles – Balanced contour supports accuracy while keeping weight manageable.
Varmint and predator rifles in 7mm cartridges where you want a bit more barrel mass and stability for repeated shot strings.
Custom builds and serious rebarrels, where the goal is to upgrade a good action with a truly high-quality barrel.
If your goal is sub-MOA performance with a 7mm cartridge, this blank gives you the raw material to get there—assuming quality gunsmithing and good handloads or factory ammo.
Key Specifications – CONTOUR #5 7MM9CM5
Based on Douglas and major distributor listings: Liberty Survival+4Brownells+4crowwholesale.com+4
Manufacturer: Douglas
Line: Double XX Ultra Rifled
Model / MFR Part #: 7MM9CM5
Product Name: 7mm 1-9 Twist CM #5 Contour Ultra Rifled Barrel
Caliber: 7mm / .284"
Twist Rate: 1:9"
Material: 4140 Chrome Moly Steel
Contour: #5 (medium-heavy profile)
Rifling: Ultra Rifled, six-groove, button-rifled, stress-relieved
Configuration: Barrel blank – non-threaded, unchambered, uncrowned
Intended Use: Custom rifle builds, precision hunting, target and long-range applications
(Exact finished length, muzzle diameter, and final weight will depend on how your gunsmith cuts and profiles the barrel.)
Why Choose the Douglas CONTOUR #5 7MM9CM5 Barrel Blank?
You should consider the CONTOUR #5 7MM9CM5 if you:
Want a match-grade 7mm barrel blank from a trusted U.S. barrel maker with decades of proven performance.
Need a 1:9 twist that pairs well with modern 7mm bullet designs for hunting and precision work.
Prefer a #5 contour that offers real stiffness and heat resistance while still being usable in the field.
Value the Douglas Double XX Ultra Rifled pedigree—button rifling, tight tolerances, and full stress relief for top-tier accuracy.
Are building or rebarreling a rifle where accuracy, consistency, and long-term durability are non-negotiable.
For gunsmiths, precision shooters, and serious hunters alike, the CONTOUR #5 7MM9CM5 – Douglas 7mm 1-9 Twist CM #5 Contour Ultra Rifled Barrel is an exceptional starting point for a high-performance 7mm rifle that’s built to shoot—and keep shooting—at a very high level.
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