In my recent testing, I decided to try out the Sierra Bullets .25 Cal 131 gr HPBT-CN MK Match bullets, known for their exceptional precision and performance. Using a 27″ Bartlein barrel, I loaded these bullets with 34.5 grains of Varget powder, a slower lot, achieving a velocity of 2695 FPS. I didn’t adjust my seating die from what I use for 135 Berger Hybrids, maintaining a 50 thousandths jump off the lands. The rifle was chambered in 25 GT and paired with a Lone Peak action, both cut and chambered by Kansas Arms Supply, LLC.
Despite these settings, the results were impressive. The Sierra 131 gr MatchKings produced a tight 1/2″ group at 100 yards, showcasing their renowned accuracy. This performance underscores the meticulous engineering behind these bullets, especially their extremely thin jackets and strict concentricity standards. Each bullet is controlled within a weight variation of ± 0.3 grains, contributing to their consistent flight and reliable performance.
The Hollow Point Boat Tail (HPBT) design of these bullets plays a significant role in their performance. The small meplat of the hollow point reduces drag, enhancing the ballistic coefficient, while the boat tail shape helps maintain stability and reduce wind drift. This combination is particularly beneficial for long-range shooting, where maintaining velocity and stability is crucial.
Moreover, the Closed Nose (CN) design further refines the bullet’s aerodynamics. This feature not only improves the ballistic coefficient but also reduces drag, providing an edge in extended-range shooting scenarios. This design has helped many competitive shooters achieve remarkable accuracy and consistency, as evidenced by my own experience.
In conclusion, the Sierra Bullets .25 Cal 131 gr HPBT-CN MK Match bullets live up to their reputation. Their precision and consistency make them a top choice for serious competitive shooters. My experience with them, paired with a .25 GT and Lone Peak action cut and chambered by Kansas Arms Supply, LLC, has been nothing short of exceptional. I look forward to incorporating them into my regular shooting routine. For anyone seeking to elevate their shooting performance, these bullets are certainly worth considering.