Looking to build another upper dedicated to bench/prone shooting. I currently have a 16" and an 18" SPR. The 18" likes 23.5gr of XBR with the 75gr HPBT and gives me 2670fps. This new upper will never be lumped through the woods so weight is not an issue with me. I know all barrels are different, but at the 20-24" lengths will I gain much velocity with the 24 over the 20"? I want to stick with .223 so not interested in any wildcats at this time. Will either of those really out perform my 18" spr? Plan on using the 75 and xbr on this rifle too.
thx, Steve
thx, Steve