Hey everyone, I am currently trying to stabilize my project rifles long range grouping as much as possible. I use an Ares CNC AW338, its been HPA converted and equipped with a real steel stock. I can send rounds with a flat trajectory to the 300ft mark but my grouping could be better. I have all variables set to the point in which its down to the barrel. I am testing an angel custom 6.01x590 and a matrix 6.03x500 right now. I have heard good things about Prommy, the new Miracle inner barrel caught my attention when I saw a video of it compared to a stock inner barrel but I have also heard negative things. Clandestine Airsoft has a lapping kit of which interests me but I no longer have access to a lathe so I am not sure if thats something I want to do. What have you guys found out to be the best? Would buying the hybrid barrel with riffling be a good idea? what if I polished the inside to smooth out all edges? What has worked for you? What barrel has gotten you the best grouping at long ranges? Whats the best length barrel for a bolt action sniper rifle?