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Bartlein Barrels

Bartlein Barrel - SS, 7mm, B#12 Heavy Palma, 9 twist, 31'' blank, 5R

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Bartlein Barrel - 7mm, B#12 Heavy Palma - 31'' 5R Rifling

Bartlein Barrel - 7mm, B#12 Heavy Palma

Are you looking to enhance your shooting performance and accuracy? Explore the impact of barrel contours, rifling, and fluting with Bartlein Barrel's 7mm B#12 Heavy Palma. Discover why this barrel is the choice of precision shooters seeking top-notch performance.

Barrel Contours and Performance

Do barrel contours affect shooting performance? Yes, they do. A heavier barrel offers advantages, especially in reducing movement caused by heat and recoil. Bartlein Barrels specializes in single-point cut rifling, eliminating stress in the barrel blank. This ensures that the contour is not as critical as with button-made barrels.

While a heavier gun tends to shoot better due to improved stability and reduced shooter fatigue, Bartlein Barrels has observed lighter weight contours performing exceptionally well. This suggests that contour choice may not be as critical as some believe.

Suppressors and Barrel Contours

Should suppressors be put on any barrel contour? No, it's not recommended. Suppressors can affect shooting performance positively on heavier barrels. The added weight at the barrel's end influences harmonic vibrations, enhancing stability. For optimal results, avoid mounting suppressors on anything smaller than a medium palma contour.

Advantages of Single Point Cut Rifling

Bartlein Barrels' preference for single-point cut rifling over button rifling is clear. Button rifling induces greater stress into the barrel blank, particularly with lighter weight contours. As contours become smaller, bore sizes may change, and opening up the bore further isn't possible. This issue is avoided with single-point cut rifling, ensuring consistent performance.

Additionally, threading the muzzle for muzzle brakes or suppressor attachments can lead to bore opening problems in button rifled barrels. Single-point cut rifling eliminates this issue, crucial for maintaining accuracy.

Significance of Barrel Fluting

Barrel fluting offers several advantages:

  • Weight Reduction: Fluting removes material without altering the contour, reducing overall barrel weight.
  • Improved Cooling: Increased surface area from fluting enhances heat dissipation.
  • Aesthetic Appeal: Fluting adds a unique visual appeal that many shooters appreciate.

Fluting Depth and Barrel Stiffness

Fluting depth matters, and excessive fluting can lead to harmonic and vibration issues, impacting accuracy. If you can't add fluting to your barrel during selection, it's likely because the contour is too shallow. Balancing fluting depth is essential for optimal performance.

Choosing the Right Rifling

Bartlein Barrels offers three rifling types: 4-groove, 5R, and Conventional-5. While the style or number of grooves doesn't significantly affect accuracy or barrel life, 5R rifling has proven benefits. Its gentler angle on the sides of the lands reduces bullet failure, enhancing stability during bullet jump from the case to the rifling.

5R rifling also benefits bullet flight, as confirmed by ammunition and bullet manufacturers. However, exceptions exist, particularly with short jacket 6mm bullets used by short-range bench shooters. These bullets may not perform optimally with 5R rifling due to the rifling's driving action. Understanding your bullet choice and rifling compatibility is crucial for optimal results.

Experience the impact of barrel contours, rifling, and fluting on your shooting performance with Bartlein Barrel's 7mm B#12 Heavy Palma. Elevate your shooting experience and explore the benefits of precision craftsmanship.

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Additional Information

Caliber / Bore Size:
B#12 Heavy Palma
31in Blank
Stainless Steel
Twist Rate:
1 in 09.00in
Groove Type:
# Grooves:
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