many , many problems. First, and biggest, YOU ARE SHOOTING OFF A BIPOD!!!!
never shoot off a bipod for groups, unless you are a masochist. Secondly, most of what i see is verticle. this leads me to believe you are having some trigger issues, some breathing issues, and possibly some bbl issues, but the group is not big enough to worry about, as far as bbl issues go. I would get a better trigger, or improve yours with homemade stoning and tweaks. then you trigger control, and breathing needs much work. Also you are shooting way too fast, for groups, that is unless you become a better technical shooter, then you can go this fast. Otherwise, I recommend that no one, no matter how good, how used to your weapon you are, how many rounds you put down it, how many times you have handloaded for it, etc., etc.,... never shoot that fast. 30 seconds between shots is better. If you must shoot off a bipod, put the feet on a superslick mylar hard sheet, or slick cutting board of some kind; this will take the torque off of the legs, and thus the bbl. Lastly we don't know anything about your ammo, really. could it maybe like something better and you just
don't know, or haven't found it yet?
Also, you mentioned clean; how clean? did you inspect, especially for copper streaks? I read an article about 1 year ago, and it covered cleaning and first shots, and then groups. it covered a very large amount of weapons, in semi, pump, lever, you name it. old rifles, new ones, scoped, non scoped, everything. Except for the rugers, and no matter what calibers, every other rifle, benefitted from a closer to poa shot, and follow up group shot, from a known, clean bbl, that had been cleaned and rested, for at least 1 day. and Also, the most accurate where the bolties, and ar semis, top cals were 243, 223, and up to 7mm, with a couple doing very well with 308's.
Lastly, for group shooting, 4 lbs is too heavy; great for hunting, but too heavy.
2.5 lbs is the perfect combo , for hunting safe, and group shooting. under 2 lbs, for target/group
shooting. Really better at ounces if a dedicated target shooter. not too mention, your trigger is
proly a 2 stage; one stage is physically better/ tighter to shoot type trigger.