AR Sponsor
Posted: 3/2/2005 4:45:26 PM EDT
| So which twist is favored for what barrel length and at what range. |
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Ammo Oracle is your friend. www.ammo-oracle.com You need to decide: 1. What the rifle will be used for. 2. What ammo you will need to accomplish that task. 3. What twist you need to stabilize the above round. 4. What is the shortest lenght to achive the accuracy required for #1. The short of it is: 1:9 will stabilize just about everything. 1:7 will stabilize 75gr better than 1:9 but still shoot 55gr OK. If you are using it as a "field rifle" get a 20" barrel If you have to go "inside" get a 16" or 14.5" (SBR or perm muzzle device) If you are hunting varmints or bench shooting, a 24" barrel with probably be better. Don't even ask about profiles because there are too many choices to list. It would probably be better to post what you need the rifle to do, then we can give you some educated options on what configuration is best. |
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I'm looking at building a bench rifle w/24" floating barrel and a light 16" version, most shooting will be at 200yds for the bench, so far it's hard to nail anybody down on the performance of the twist, my Bushmater (20") shoots well but if I'm going to put the money into a better shooter I need to know the whys and there-fors of them. And theres that itch to build something a little better and the AR-15s offer the opportunity to do that. |
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That's up for debate. Especially since I built my patrol rifle so I don't have to worry about lugging a 18" 870, that dosent really do anything well. I think you will find that once you become proficient with it, a light carbine with the correct ammo is a better all around tool than a shotgun can ever be. I used to think the shotgun was only better at intimidation until I watched the eyes on a group of local crackheads when another officer covered them with his M4. They DID NOT like the look of that rifle and kept asking what it was. The only thing the 12ga really has is the "one shot stop" ratio with Slugs. The last time I read the statistics it was like 98%. Of course they don't seem to print how often that slug punched right through and kept on going. (definitly not good) <Back on Topic> All of my serious AR's will carry a 1:7 barrel because it is best for my intended ammo 55gr for work, 75gr at home. My paper/varmint AR has a 20" 1:9 because it usually shoots 55gr WWB, and I got it cheap. 
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