Picked up a Savage 111 in .300 win mag with Nikon 3-8 scope. First time out was getting good groups. Shooting .5" or less at 100yds. Second trip out to different range that allowed me to shoot further I was trying to sight in for 200 yrd zero. This time out I took the Federal factory loads that I started with and three different steps of handloads. Handloads are Berger VLD's 185gr backed by 72, 74 and 76gr loads of powder. At 200yrds I was unable to get anything that could be considered a group. Ranging anywhere from 8" to off paper on a 16" wide target. Rifle does not have accustock and is bedded tight, scope is not moving. Boresighted well. Any advice of what I should be looking at? I a needless to say lost. I have never had this problem with any of my other rifles. Thank you in advance for any assistance.