Cases do shrink with repeated firing/reloading, and this affects headspace which affects accuracy. Data demonstrating how accuracy decreases with once-fired cases has not been easy to find, though people anecdotally claim it happens. Some shooters think new cases produce the best accuracy, while some prefer once-fired. Some shooters insist only that the brass be the same headstamp, and they aren't as concerned about what brand they use. Starline brass gets the most nods from active Bullseye shooters, but Federal brass is also used frequently. Less headspace is desired, so if you sort brass by length, longer cases might provide better accuracy because they fit in the chamber with less movement. Uniform length matters because it affects headspace and crimp, which affect accuracy, so you want that to be as close to the same as possible, too. Case volume affects pressure, so you want it to be as close to the same as possible. That might be the case for shooting at 50 yards, but my experience suggests that pushing them faster does not degrade accuracy at 25 yards- but that's the subject of another article.Ĭases matter with respect to uniformity in case volume and length. Also, some shooters believe this speed range is the sweet spot for accuracy. High speeds are not required, and more speed means more recoil. Generally, the velocity ranged between 700 fps and 800 fps. They are at the fast end of pistol powder burn rates and generally require small charge weights.Īs you can see from the chart, there was a considerable range of charge weights. All these powders are capable of excellent accuracy in the. The powders used by Bullseye shooters include VihtaVuori N310 and N320 Alliant Bullseye Hodgdon 700-X, Clays, and Titegroup and Winchester Super Target (WST) and 231. Top choices include Hodgdon 700-X, VihtaVuori N310, Alliant Bullseye, Hodgdon Clays, Hodgdon Titegroup, WST, and W231. Also important for Bullseye loads is a relatively fast-burning powder. Through the principle of conservation of mass, the powder's weight is part of the formula to calculate recoil force, and less powder weight contributes less to the mass exiting the barrel. This is because the weight of the powder is part of the mass that is ejected out of the barrel along with the bullet. Powder weight matters because a powder that requires less weight to push a given bullet to a given velocity produces less recoil than a powder that requires more weight. Fast-burning powders require less weight to reach a given velocity than slow-burning powders. In keeping with the goal of low recoil, relatively fast-burning powders best achieve this goal. Jacketed bullets generally have the edge in accuracy over lead bullets, and among jacketed bullets, jacketed hollowpoint bullets are usually favored.Īccurate bullets need to be paired with the right gunpowder. 45 ACP loads with 185-grain jacketed bullets. There is no single formula that all Bullseye shooters employ several loads will produce excellent accuracy. Regular shooters- like me- can enhance our chances of hitting the target if we use super-accurate ammo, and there's no reason why we can't use the same ammo that Bullseye shooters use. The ammunition must be up to the task as well. But an accurate gun is only one part of the formula. What type of accuracy is required to compete at the top level in this sport? A common benchmark is that the gun must be capable of a 10-shot group at 50 yards that is less than 1.5 inches center-to-center. The handgun, the ammunition, and the shooter's skill must all be top level to place hits within these minuscule dimensions. At 50 yards, the B-6 target 10-ring is 3.36 inches in diameter, and the X-ring is 1.695 inches in diameter. Bullseye competitions place the targets at 25 and 50 yards.
Bullseye shooters- those shooters who participate in Bullseye matches- fall into this category because they need extreme accuracy to be competitive. They demand the most accurate guns and ammunition possible. Serious target shooters can be a fussy lot.
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