I want to preface this post by saying I have a new barrel for my rifle that Kevin Cram will be putting on after deer season. I have a remington 700 BDL Stainless with the trigger worked in an HS-Precision stock. I have/had a leupold mark 2 4-12 mounted with leupold dovetail rings and bases. I am/was shooting HSM with 168gr berger vlds. I was getting about a 10" group at 100 yds and the spent cases were incredibly hard to extract. This is a brand new rifle so I was stressing....bad! I took the rifle home did a good cleaning and came back with the same results...except. On one shooting iteration I was getting the groups down to a stellar 6" spacing. Went down and checked the target, which was unnecessary as I was using shoot-n-see targets, but felt I must be missing something. Yep, 6" group. I got back to the shooting bench, loaded a 168 berger, squeezed the trigger, rifle goes off, no F#!%ing new hole in the target. Ok, maybe I jerked the trigger. Repeat the sequence, no hole again...WTF. Now I'm a little TO'd. I load another and I'm back on the paper! No adjustments were made, but the hole is in the same vicinity of the previous 6" groups. Next shot is in the same vicinity as the previous. And yes, the cases are still difficult to extract. Ok, at this point I am ready to run down to the pawn shop and trade the rifle for a single shot .22 cricket, I hear they group well!! I take a restless night to think of the probable causes. I read that bergers are tempermental. I get some new Leupold PRW rings and bases. Remount the scope and buy some cheap wal-mart remington core-lokt ammo. Deep clean the barrel and bore sight the rifle. First shot is abot 1/2" low, second shot is 1/2" low about 1/4" away! Cases are easy to extract!! I move the target to 200 yds make some scope adjustments, DEAD ON! I'm getting great groups! WTF!!! Can someone explain why that happened???