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Bartlein Barrels

Bartlein Barrel - SS, .375 Cal, B#4 Bull Sporter, 12 twist, 26'' blank, 5R

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Bartlein Barrel - .375 Cal SS B#4 Bull Sporter for Unmatched Shooting Accuracy

Bartlein Barrel - SS, .375 Cal, B#4 Bull Sporter, 12 Twist, 26'' Blank, 5R

Introducing the Bartlein .375 Caliber Stainless Steel B#4 Bull Sporter Barrel, a premium choice for precision shooters. This barrel, with its 12 twist rate and 26-inch blank, is equipped with the advanced 5R rifling, making it a prime selection for those seeking exceptional accuracy and performance.

Advanced Manufacturing for Optimal Performance

At Bartlein Barrels, we specialize in single point cut rifling, a technique ensuring minimal stress on the barrel blank. This process, combined with our precision engineering, results in barrels that consistently provide unparalleled accuracy for serious shooters.

Impact of Barrel Contour on Performance

The B#4 Bull Sporter contour is designed to optimize balance between weight and stability. It's ideal for shooters who require a barrel that can handle the rigors of both long-range precision and dynamic shooting environments.

Superior 5R Rifling for Enhanced Shooting Accuracy

The 5R rifling in our barrels is known for its ability to reduce bullet deformation, thereby improving accuracy. This rifling style, combined with the precision twist rate, ensures consistent performance across various shooting disciplines.

Fluting for Aesthetic and Functional Benefits

Our barrels offer fluting options, enhancing aesthetic appeal and providing functional advantages like weight reduction and improved cooling. This design feature does not compromise the barrel's stiffness or accuracy, ensuring top performance in all conditions.

Choosing the Right Rifling for Your Needs

Bartlein offers various rifling styles, including 4-groove, 5R, and Conventional-5, each providing unique advantages. Our extensive testing and feedback from ammunition and bullet manufacturers confirm the high accuracy and longevity of our barrels.


The Bartlein .375 Caliber B#4 Bull Sporter Barrel represents the pinnacle of precision barrel manufacturing. Ideal for competitive shooters and precision enthusiasts, this barrel is a benchmark in accuracy and quality. Choose Bartlein for a barrel that elevates your shooting capabilities to new heights.

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Additional Information

Caliber / Bore Size:
.375 Cal
B#4 Bull Sporter
26in Blank
Stainless Steel
Twist Rate:
1 in 12.00in
Groove Type:
# Grooves:
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