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Bartlein Barrels

Bartlein - Stainless Steel Barrel Blank - .284 (7mm) Cal

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$449.00

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Achieve exceptional accuracy with Bartlein Stainless Steel Barrel Blank in .284 Cal! Perfect for custom builds, it offers match-grade quality and performance.

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Overview

A cut-rifled 7mm match blank in 1:8 or 1:9 twist and nine contours

The Bartlein .284 (7mm) stainless barrel blank is a 5R single-point cut rifled match blank for a gunsmith to chamber, thread and crown for your bolt action. It is offered in nine Bartlein contours at 26" finished length, in 1:8 or 1:9 twist. Any cartridge on the 7mm bore can be chambered in it, from 7mm-08 Rem, .284 Win and 7 PRC to 7mm Rem Mag, 7mm WSM and 7mm RUM.

Single-point cut rifled and hand lapped

Bartlein uses single-point cut rifling only, never button rifling, and hand laps every blank when it is finished. The .277" bore and .284" groove are Bartlein's standard 7mm dimensions.

5R rifling, five lands

Five lands means no land sits directly opposite another, and the land sides are angled instead of the 90 degree corner of conventional rifling. Bartlein says the jacket deforms less on the jump into the rifling, and rates 5R at up to 5% less BC loss from jacket deformation.

Two twists: 1:8 and 1:9

Every contour on this page is offered in both twists except the #2B Medium Sporter, which is 1:9 only. Pick the twist for the bullets you plan to run.

Nine contours, 3.60 lb to 6.9 lb

From the #2B Medium Sporter at 0.630" muzzle and 3.60 lb, through the #3, #3B, #4, #13 Varmint, #14 M24/M40 and the #11 and #12 Palmas, to the #7 MTU at 0.930" muzzle and 6.9 lb. Weights are Bartlein's at chart length.

Ships 1" longer than 26"

Bartlein makes every blank 1" over the finished length so the gunsmith can cut the bell mouth off the muzzle and crown it. Every blank on this page is 26" finished, so it arrives at 27".

Suppressor muzzle diameter

Bartlein recommends a 0.700" muzzle minimum under a suppressor. Every contour here meets it except the #2B (0.630") and #3 (0.670").

Specifications

Barrel

Caliber.284 (7mm)
Bore and groove.277" x .284"
SteelStainless steel
Rifling5R, single-point cut, hand lapped
Twist options1:8 or 1:9 (#2B: 1:9 only)
Length26" finished, all contours
Blank length27": 1" over the finished length, for cutting and crowning
FinishBlank: unchambered, unthreaded, uncrowned

Sporter contours (breech dia, muzzle dia, weight at chart length)

#2B Medium Sporter1.200" breech, 0.630" muzzle, 3.60 lb at 24"
#3 Heavy Sporter1.200" breech, 0.670" muzzle, 3.95 lb at 26"
#3B Light Bull Sporter1.200" breech, 0.700" muzzle, 4.20 lb at 26"
#4 Bull Sporter1.200" breech, 0.750" muzzle, 4.95 lb at 26"
#13 Rem Varmint/Sendero1.250" breech, 0.830" muzzle, 4.95 lb at 26"
Sporter shank2.750" straight shank (#13: 2.000")

Straight taper and Palma contours

#7 MTU1.250" breech, 0.930" muzzle, 6.9 lb at 26", 2.750" shank
#14 M24/M401.200" breech, 0.900" muzzle, 6.35 lb at 26", 3.000" shank
#11 Medium Palma1.250" breech, 0.820" muzzle, 5.45 lb at 30", 3.000" shank
#12 Heavy Palma1.250" breech, 0.900" muzzle, 6.30 lb at 30", 3.000" shank

Twists offered here

1:8#3, #3B, #4, #7, #11, #12, #13, #14
1:9#2B, #3, #3B, #4, #7, #11, #12, #13, #14
Other contoursAvailable to order

Fitment

Will it work with your build?

Works with

  • Every 7mm (.284) cartridge: 7mm-08 Rem, .284 Win, 7 PRC, 7mm Rem Mag, 7mm WSM, 7mm RUM
  • Bolt action rifles, once a gunsmith has chambered, threaded, crowned and fitted it
  • Suppressors on the #3B and heavier contours (0.700" muzzle or larger)
  • Muzzle threads of 1/2x28, 5/8x24 or 3/4x24, cut by your gunsmith

Will not work with

  • Any rifle as shipped: this is a blank, not a pre-fit or drop-in barrel
  • Pre-fit or drop-in installs: Bartlein makes no pre-fit or gas gun barrels

Gunsmith fitting and a flat shipping charge. This blank must be chambered, threaded, crowned and installed by a certified gunsmith. Rifle barrels and barreled actions ship for a flat $14.95 per order regardless of quantity and do not qualify for free shipping.

Detail

Fitting it and the fine print

Which contour and twist do I order?

Match the contour to the barrel channel of your stock or chassis and to the weight you want to carry. Breech diameter is 1.200" on the #2B, #3, #3B, #4 and #14, and 1.250" on the #7, #11, #12 and #13; your gunsmith turns the shank to fit the action. Bartlein's view is that a heavier contour resists walking as it heats, but with cut rifling the contour matters less than it does on a button-rifled barrel, and they have seen lighter contours shoot as well or better. For a suppressor, Bartlein recommends a muzzle of 0.700" or more, which is the #3B and up.

Every blank here is 26" finished. Bartlein's chart length is 24" for the #2B and 30" for the two Palmas; those are Bartlein modifications of the contour, which Bartlein allows. Twist is 1:8 or 1:9 on every contour except the #2B, which is 1:9 only. Bartlein publishes no twist-by-bullet table, so choose the twist for the bullets you intend to shoot. Other contours are available to order.

What does 5R rifling mean, and does it matter for 7mm?

Bartlein offers three rifling styles: 4-groove, 5R and Conventional-5, all single-point cut. This blank is 5R. In 5R the bore has five lands, so no land sits directly opposite another, and each land meets the groove on an angle instead of the 90 degree corner of conventional rifling. Bartlein says the bullet jacket deforms less as it enters the rifling, and quotes testing that puts BC loss from jacket deformation up to 5% lower.

Bartlein also says the style or number of grooves has no real bearing on accuracy or barrel life. Their one exception is light-for-caliber, short-jacket bullets in .224 (35 to 60 gr) and 6mm (65 to 68 gr), which they say do not like 5R; that exception does not cover 7mm bullets.

Why does the blank arrive an inch longer than 26"?

Every Bartlein blank is hand lapped after rifling, and lapping can leave a slight bell mouth at both ends. Bartlein builds a minimum 1.0" muzzle cut into the blank profile so the gunsmith can remove it when cutting to length and crowning, which is why a 26" blank arrives at 27". At the breech, chambering takes the bell mouth out on a centerfire blank, so nothing extra is needed there.

What voids the Bartlein warranty?

Bartlein lists three things. Fire lapping, including any compound made for it such as Tubb Dust. Any abrasive compound in the bore or on a brush, including Iosso, Witch's Brew, JB Bore Polish (red), Thorroclean, Flitz and CLR. And a brush on a drill run back and forth through the bore.

Caliber
.284 (7mm)
Bore and groove
.277" x .284"
Rifling
5R single-point cut
Twist
1:8 or 1:9
Length
26" finished
Steel
Stainless

Works with

  • 7mm-08 Rem, .284 Win, 7 PRC
  • 7mm Rem Mag, 7mm WSM, 7mm RUM
  • Bolt actions, gunsmith fitted

Will not work with

  • Any rifle as shipped (blank)
  • Pre-fit or gas gun installs

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Shipping

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Most orders over $199 ship free. We ship same day on all in-stock orders received before 14:00 Mountain Time. Free Shipping orders use standard ground and typically deliver in 1 to 4 days. Excludes international orders, Alaska and Hawaii, and select oversized items. All orders valued over $1,000.00 ship signature required.

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If you need an item fast, cost-effective expedited options are available at checkout. Most expedited orders ship via FedEx or Overnight Mail.

Local customers

We are in 2317 Grand Park Dr Unit 2B Grand Junction, CO 81505 and we stock every item we sell. We love seeing customers and encourage you to stop by — just leave a comment in the order notes during checkout.

International shipping

We ship to international shoppers in 82 countries registered with EasyExport®. Registration is free and EasyExport does not share your information, and you can register before or after you shop. See International Export for details.

Returns

Not quite perfect? Red Hawk will make it right, no matter what. Guaranteed. Most items have a 30-day window from the day the product was delivered to you. Excluded are ammo and ORM-D products, custom ordered items, items not in original condition, and international orders. Every item we sell also carries a manufacturer warranty, and we only work with manufacturers who stand behind their products.

Read the full shipping and returns policy

Common questions

How do I know the items I'm buying are compatible?

Check the Fitment section above — it lists what this part works with and what it does not. If you are still unsure, call 1-970-242-6166 or use the chat icon at the bottom right of the page — our team builds precision rifles with these parts every day.

Where are you located?

2317 Grand Park Dr Unit 2B Grand Junction, CO 81505. We ship every single order from our own warehouse and take pride in being part of our local hunting and competition shooting community.

I can't find the configuration I need — can you special order it?

Absolutely. Call 1-970-242-6166.

What if there is an issue with the product I ordered?

We will make it right, no matter what. We only carry products from top-tier manufacturers who stand behind them.

Which items need to ship to an FFL?

Only serialized firearm actions and receivers require an FFL transfer. Barrels, stocks, triggers and accessories ship straight to your door.

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