Videos tagged with Bullet Stability

This video investigates an accuracy problem with a Browning XBolt 2 in 6.5 PRC, identifying a 1:7 twist rate as a potential cause for keyholing and poor performance with certain ammunition. The investigation involved testing the twist rate, examining the barrel, and consulting with ammunition manufacturers. The conclusion suggests a combination of an overly fast twist rate and ammunition construction issues led to the observed problems.

This video delves into the intricacies of rifling twist rates in firearms, explaining how they are designed and their impact on projectile stability and performance. It highlights that while bullet length is a more critical factor than weight for determining optimal twist rate, factors like barrel length, propellant type, and land/groove dimensions also play significant roles. The discussion emphasizes that for most civilian shooters, minor variations in twist rate have negligible effects, but precision shooters and military applications benefit from optimization.

Ballistic gel testing is a limited tool that only indicates how a round performs in gel, not its effectiveness as a self-defense projectile. Factors like bullet shape, size, and resistance significantly influence penetration, and success in gel does not guarantee performance against dense muscle, bone, or heavy clothing. While gel tests can offer basic insights into velocity, mass, and bullet stability, they are not a reliable measure of a round's stopping power or suitability for self-defense.

This video explains the critical role of rifle twist rate in bullet stability and accuracy. It details how insufficient or excessive twist can negatively impact performance, leading to instability or even bullet disintegration. The discussion also covers the aerodynamic advantages and manufacturing inconsistencies of polymer-tipped bullets versus open-tip designs, emphasizing the importance of matching bullet weight and length to a rifle's twist rate, especially for handloaders.

This video outlines five essential online resources for precision rifle enthusiasts. It details how to use the Applied Ballistics website's calculator for generating range cards, the Berger website's twist rate calculator for ensuring bullet stability, and Sniper's Hide for advanced ballistics data. Additionally, it highlights Storm Tactical for printable targets and Gun University for comprehensive firearm reviews with a unique grading system.

This video, presented by firearms expert Ian McCollum of Forgotten Weapons, delves into the mechanics and historical application of gain twist (progressive twist) rifling in small arms. McCollum explains how this rifling technique, characterized by an increasing rate of twist from breech to muzzle, aims to improve bullet stability and prevent jacket separation, citing examples from early revolvers to modern high-powered handguns. The discussion highlights its use in specific firearms like the Carcano 1891 and S&W 460 X-frame, while also touching upon its effectiveness and historical context.

This guide details a 100-yard accuracy test for various 5.56mm ammunition types fired from a Ruger MPR rifle. The test, conducted by an experienced shooter, systematically evaluates FMJ and match-grade rounds to determine their comparative performance. Key takeaways include the surprising accuracy of M855 and potential instability issues with heavier match bullets in certain twist rates.

This video, titled 'Quickies- The difference between a 1/7 & 1/9 twist barrels,' aims to educate viewers on the distinction between two common barrel twist rates for firearms. The content focuses on the technical specifications of rifle barrels, specifically highlighting the 1/7 and 1/9 twist ratios and their implications for bullet stability and performance. This information is crucial for firearm owners and enthusiasts when selecting or understanding the capabilities of their rifles.

This video features Bryan Litz, a recognized expert in ballistics, explaining the critical concept of the transonic range in long-range shooting. He details how bullet performance becomes less predictable as it approaches and falls below the speed of sound (1340 ft/s), emphasizing the increased complexity of factors like drag and spin drift. Litz recommends his own extensive book series for those seeking to master these advanced ballistic principles for improved field accuracy.

This video debunks the 'brush gun' myth, demonstrating through controlled testing that even traditional brush calibers like the .30-30 Winchester and heavy hitters like the .45-70 Government experience significant bullet deflection when encountering small obstacles. Instructor Chris Baker uses pine furring strips to simulate brush, showing that all tested calibers, including the .223 Remington, are susceptible to trajectory changes and destabilization. The key takeaway is that no bullet is a true 'brush buster,' and hunters should prioritize clear shots and use optics to identify obstructions.

The Hornady A-Tip Match bullet was awarded Guns & Ammo's Innovation of the Year for its advanced aerodynamic design. By utilizing an aluminum tip, Hornady precisely manipulates the bullet's center of pressure and center of gravity relationship. This innovation leads to superior in-flight stability and improved accuracy, even at extended ranges, addressing inconsistencies found in traditional bullet designs.

This video tests 110-grain subsonic .223 ammunition, evaluating its terminal performance and reliability. The test reveals that while the ammunition is subsonic from a 16-inch barrel, it did not reliably cycle the action of the AR-15, requiring manual cycling. Terminal ballistics showed significant yawing and a total penetration of 19.5 inches in ballistic gelatin, with initial disruption around 3 inches. The presenter suggests limited practical application for typical users, comparing its niche utility to subsonic 300 Blackout.