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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
.223 vs 5.56 Chambers - HUGE bullet jump?
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<blockquote data-quote="Kevin Thomas" data-source="post: 453521" data-attributes="member: 15748"><p>Bookworm,</p><p> </p><p>To begin with, what ammo have you shot in this rifle, and what kinds of groups have you seen? If you've been using the standard M193 55 grain FMJ stuff, three MOA is not at all uncommon for that. Not accurate by most of our standards, but perfectly adequate for what the rifle/ammo was intended for. If you want to use better ammo in there, I'm sure the rifle will deliver far (FAR) better groups than this with little difficulty. </p><p> </p><p>Since you're using this as a varmint gun, I assume you'll be using the 52-53-55 grain bullet range? These will shoot just fine, even in a fairly fast twist. I also think you're worrying far too much about the jump. Your OAL is basically set by your mag length, period. Unless you take some drastic measures such as mag alterations or single loading, you're going to be at 2.260" (max), end of story. Don't sweat it, they shoot fine at this length.</p><p> </p><p>If you're interested in accurizing the rifle, the first and most important step you can take is to float the barrel. There's any number of float tubes out there, and all of them will improve the inherent accuracy of the rifle. Next step after that is a better trigger, and again, there's plenty of choices out there. With these two alterations, it's rare to find a properly built AR that won't shoot well under MOA, usually with a fairly wide variety of components. </p><p> </p><p>So, what are you using for ammo now, and what types of groups have you seen so far?</p></blockquote><p></p>
[QUOTE="Kevin Thomas, post: 453521, member: 15748"] Bookworm, To begin with, what ammo have you shot in this rifle, and what kinds of groups have you seen? If you've been using the standard M193 55 grain FMJ stuff, three MOA is not at all uncommon for that. Not accurate by most of our standards, but perfectly adequate for what the rifle/ammo was intended for. If you want to use better ammo in there, I'm sure the rifle will deliver far (FAR) better groups than this with little difficulty. Since you're using this as a varmint gun, I assume you'll be using the 52-53-55 grain bullet range? These will shoot just fine, even in a fairly fast twist. I also think you're worrying far too much about the jump. Your OAL is basically set by your mag length, period. Unless you take some drastic measures such as mag alterations or single loading, you're going to be at 2.260" (max), end of story. Don't sweat it, they shoot fine at this length. If you're interested in accurizing the rifle, the first and most important step you can take is to float the barrel. There's any number of float tubes out there, and all of them will improve the inherent accuracy of the rifle. Next step after that is a better trigger, and again, there's plenty of choices out there. With these two alterations, it's rare to find a properly built AR that won't shoot well under MOA, usually with a fairly wide variety of components. So, what are you using for ammo now, and what types of groups have you seen so far? [/QUOTE]
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Rifles, Reloading, Optics, Equipment
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.223 vs 5.56 Chambers - HUGE bullet jump?
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