![]() ![]() Now that we have laid out the calibers in question, next, let’s go over the parameters in choosing the best round for you. Hopefully, at the end of this article, you can apply the same questions and principles to select which caliber you want to dive into the awesome world of long-range shooting. But this list is comprehensive enough to cover the most popular and best-performing rounds that are regularly used by shooters across most long-range disciplines. Now, are these the only viable options for a long-range cartridge for you? 243 Winchester, 6mm Creedmoor, 6.5mm Grendel, 6.5mm Creedmoor, 6.5 PRC (Precision Rifle Cartridge), 6.5x47mm Lapua. Overall best performance for the cost and practicality is the goal. I am not here to say that this round or that round is the best for a military sniper or a bench rest shooter. I am here to share what knowledge and experience I have to help you pick a viable option. ![]() After answering the questions above, the rest of this guide should be able to help you find which round is right for your mission and budget. Just like anything in life, each caliber you pick will have a list of pros and cons. 308 Winchester or reaching deeper into your pockets for the new and improved. What is your mission? What is your goal? How do you want your rifle to perform? Are you operating a bolt or gas gun? Do you have the equipment and knowledge to reload? Is your rifle shooting steel or live targets? Is your shooting hobby or mission dependent on a limited budget? All of these factors will ultimately decide if you will be sticking with ole reliable – the. To find the ideal caliber you’ll have to ask yourself a few questions. Best for Seasoned Shooters: 6mm Creedmoor.Best for Beginners: 5.56mm/.223 Remington. #The maximum amount of fps for a subsonic rounds plusWhen you put a cap on the velocity (speed of sound), have a minimum amount of pressure to get the bullet out of the bore safely, and need the bullet to be effective (it needs to carry its momentum in the mass component, not the velocity component of its ballistics and energy), then the only way to go is heavier.Ī light bullet might be too little powder (weird ignition issues), too little pressure (or a curve not ideal for the barrel, leaving a big fireball), and too ineffective at subsonic velocities, while a heavy bullet would have sufficient powder, pressure (even more important in semi-autos using the pressure to cycle the action, plus a longer dwell time picking up energy), and terminal effect. Heavy bullets are slower, but are affected by drag less and are sometimes more effective when they get to their target. Those relationships combined work out such that, for the same kinetic energy, a light bullet is fast, flat shooting, but penetrates less and slows down much faster. In terms of terminal ballistics for the same bullet shape, heavier means better penetration. BC also has a relationship with bullet mass and velocity. Drag has a linear relationship with mass and an exponential relationship with velocity. Momentum has a linear relationship with velocity and mass. Kinetic energy has a relationship with mass and the square of velocity. A cartridge imparts kinetic energy into the bullet through pressure, and it is a race of the pressure curve to the barrel length for getting the most energy transferred to the bullet before the bullet leaves the barrel. A cartridge converts chemical potential energy (gunpowder) into kinetic energy (motion of the bullet, heat, sound). ![]()
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