^^^ Try the lighter bullet loads using Trail Boss without the toilet paper filler. Could be your issue. I've used TP in Trail Boss lighter .308 Win. loads and accuracy was absolutely horrid. I was seeing up to 24" vertical dispersion at 100 yds. Once I got rid of the filler, the problem resolved itself.
I wouldn't expect miracles using those bullets but they should be decent enough for accuracy between 50-75 yards - 100 may be pushing it. Part of the fun is experimenting to find out, right?