Hello all, this is my first post and I do hope I am putting it in the right section. I have had several pistols and rifles over the years for just short range plinking. I am now interested in learning about shooting at longer ranges. The gun I am interested in is an RRA LAR 8. Barrel length is what I'm confused about. I am thinking that I want a 20-inch barrel because I have read somewhere that .308 powder is all burned by 18 to 20 inches. Is this true??? The 26 inch barrel would just be for better accuracy??? Or does it just depend on the ammo being used??? Thanks in advance and I hope this is posted in the correct place. Please have patience with me. I am just trying to learn. I tried to search but could find what I am asking about.