AR Sponsor
Posted: 6/23/2009 3:56:12 PM EDT
|
A couple of questions have come up in preparation for a 308 build. Will there be a difference between a 24 and 26 inch barrel in terms of accuracy or speed? Does anyone have the dimensions of a barrel that they have had custom made?
What is a good option for a bolt carrier group? I am looking for the best quality that is available. If you have a source for where I could get one, please provide. |
| Yes, barrel length will effect velocity and ultimately accuracy. U may also want to consider the fact that a 24 or 26" gas gun is significantly longer and more unwieldy than a bolt gun of the same bbl length. That being said, in the specops community, our gas guns are 18-20", depending upon caliber, variant, etc. A good 308 gas gun will be expensive and difficult to build. Probably the BEST available without taking out a 2nd mortgage is the variant offered by Larue. I believe that is in the neighborhood of $2500, but don't hold me to it. I have the Remington R25. I added a Jard trigger, Magpull stock, DPMS free float rail, ergo pistol grip, and of course Harris bipod. I get equal performance to the SR25, and better than my new (issued M110)The gun retails for $1600, in stock form. Of course, once I added the mods, it is in the same $ category as the Larue. Note- I haven't even mentioned optics (more $).DPMS has a new variant that at present is only available to gov't entities, I havent used it yet. They also sell another model in the (I think) $1000 range, with a 24" barrel. I was not impressed at all with that gun. In short, I build A LOT of guns for myself and others, mostly AR's. I am also a qualified armorer. I steer people away from 308 builds, as they are a headache and very $ intensive, and its just easier to modify a store gun. |
| I hear your comments on the bolt vs. the gas gun. I like the bolt better also, and probably always will, but I want to do something different here. I pretty much already have all of the parts minus the barrel, BCG and gas block? Do you know how long the barrels on the SR-25 are? Since you are an armour, do you know what the dimensions on the barrels on the SR-25 are? I don't recall seeing any spec info on the Knights Armament website. |
| From everyhting I have done, read and heard from very high-end gunsmiths and barrel makers, barrel length really doesn't have anything to do with accuracy. Velocity is where you pay the piper. For example, I have seen a guy shoot MOA at 300 yards with a 10.5 Noveske barrel shooting withhis elbows on the table as his rest. That being said, I have read the most payoff you get from barrel length on a 7.62 is usually 24". After that, the increase in velocity begins to deminish when the added length is taken into consideration. |
| I have a Krieger 20" HB on mine from FA. & it shoots better than me . Build it , there is no diff. between a 308 type platform than a 5.56 . Just the size of the parts and in some cases just a little harder to get some parts . The 5.56 types have been around a lot longer ,so the parts base & availability with some parts is better. For now , but the 30 cal. is getting bigger every day . |
AR Sponsor