Re: cause of fliers?
I know a friend had a 338wm and couldn't hit a 4'x4' pice of plywood at 200yds with the bipod on it. Without it, less then 3" groups were the norm.
He free floated the barrel so no contact was made all the way to the reciever with a buisness card folded around the barrel.
The gun now shoots the same with or without the bipod, about 3" at 200yds.
I floated the barrel on my sons 308 Win classic compact because he often uses a Harris bipod too. Strange but no difference at all was noticed either was. A few loads that always produced fliers still do. The loads were 2" plus at 100 yards all the time so they never were a good choice anyway, just went back and checked them after freefloating just to see.
I got tired of retorquing action screws on my Ruger 416wby after every ten rounds or so, so I really torqued them down GOOD the last time.
I shot the biggest 3" to 5" groups I ever did see from it, all with my best load that shoots under .8" all day long. Boy is a torque wrench in order here as well as some serious testing all over again. Too bad because they still haven't loosened yet.