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Posted: 1/17/2008 1:10:26 PM EDT
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Hey guys i thought there was a tacked thread with this info but I can't find it. I have a stripped lower and will probably finish it off with a kit from Delton. i'm having a hard time deciding between a 16 or 20 inch barrel. I know that the 16" will lose velocity, but I'm not sure how much this will matter. In the few years I have been shooting I have never shot past 100yds... With the cost of ammunition now I will not be blasting away with this rifle...everyone once in a while I will shoot it but mostly it will be around_just in case. In my situation what barrel length would yall recommend? I figure lots of .mil and leo guys use <16" and its plenty, but the extra 4 " might add enough velocity etc to make the extra length worth it. Also...I know this question has been asked a million times but I still can't decide on whether or not I need to spend the extra cash to get a chrome lined barrel. I know match barrels are not chrome lined to save accuracy....but I'm not shooting for MOA accuracy. In all likelihood I will be using a bore snake to clean the barrel...will chrome lining even make a difference in this case? Have to run the bore snake through 2-3 times instead of once? Thanks guys....sorry because I know I'm kinda  over this......ETA Any reason for me NOT to go with 1/9 twist barrel? |
More like 100-120fps. 25-30fps/inch on 16-20"barrels. drops to 10-20 fps/inch with longer barrels. To the OP, If you're shooting at 100yds you don't need to shoot 75, 77 or 80 gr bullets, you have to seat those so deep in the case they become inaccurate and accuracy in wind would be the only reason to shoot them anyway so you're defeating the purpose. Try 69gr SMKs if it's windy. Nosler 55gr ballistic tips can be very accurate. load them with 25gr H4895. The 62 gr bullets are a little off balance so they are not the most accurate thing out there but they will shoot out of a 9 twist. Are you building or buying? If building look at White Oak armament they have good SS 7 twist DCM barrels for about $200. These are different(much better) than what you would get from RRA or almost any other distributor. Edit- my mistake it's a 7 twist but will still be a world apart from those $167 barrels from Del-ton |
for 5.56, 16" will be fine--go w/ the one that suits you and your needs (in this case, from what you have said, 16" will be just fine )1-9 will be fine i'd opt for the $50 upgrade for CL, since, imo its a relatively small investment for very little drawback...but YMMV this might help also: ammo.ar15.com/ |
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