I am looking to replace my RRA factory barrel with a bull/varmint style barrel in the 18-20" range. I am a varmint shooter so I am looking for better accuracy than the factory barrel, sub 3/4" at the maximum. I shoot 55 gr bullets pretty much exclusively. I have always used 1 in 9 twist rates so that is what I am looking at mostly, but have read 1 in 8 twist will stabilize the lighter bullets. Anyway, I have been looking at the DPMS barrel from Midway, and the RRA varmint barrel. I am looking for information as to the best quality/accuracy I can get from a sub $400, hopefully sub $300 barrel. Any reviews or information would be awesome, I don't want to waste my money with something that I won't be happy with in the accuracy department. Thanks.