Re: AR question
Sounds like something is not right, 5" is way too big a group. I have a 1:9 twist Bushnell with a 20 inch HB. It shoots just about everything into an inch or so including my handload of 25 gr of Varget with a 69gr SMK. I also this load in my 24" Varmint AR, DPMS. It shoots .25" at 100. I don't think barrel length should make a difference using Varget.
"Let us speak courteously, deal fairly, and keep ourselves armed and ready"-T. Roosevelt