Posted: 3/20/2007 5:40:38 PM EDT
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24" versus 20": Plus: Slight advantage in velocity and energy (which may lead to slight acuracy advantage,cespecially at slightly longer ranges as velocity starts to scrub off and any winds have made/are making their presence known), and availability of 24" in optional 1:12 twist. Minus:24" is heavier and longer. Steve/RRA |
| I don't have a comparison resource, but check out a recent (on news stands now) article in Shooting Times magazine. They shoot a RRA A4 Varmint in 18" and the author likes the model alot. He achieved 0.3" groupings (5 round) with factory ammo (62 grain, I think). I don't have the article otherwise I'd give more details (I lent the mag to a friend who is making the same decision you are--he was convinced he wanted the 24" but is now leaning more towards the shorter barrels for easier handling (including maneuverability). That all said, another consideration for you, depending on $$$ is to buy a 24" Varmint, and a 16" carbine separately. Then you've got all of your bases covered. Just my $0.02. Good luck! |
Thats the best idea I have a 16" elite car a4, 20" standard a4 and this new varminter I just built. |
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I found this link it is an experiment corelating velocity with barrel lenth for a .223, they started with a 22" barrel and went down to 10" so far. It is interesting exstrapilating from what I saw it would seem that the defference between a 20" and a 24" barrel is somewhere around 150 fps on average. www.accuratereloading.com/223sb.html |
| Just shot my new 24" Varmint upper today. Using 69 Sierra MK over 24 grns Varget I shot 5, 5 shot groups. Smallest was .59, largest was .89. This is the same load my NM upper shoots well. Also tried some old American Eagle I had and that suprized me, 5 shots in just under 1 inch. ADCOM was crap however, 3 inch groups ! |