Re: 7mm RUM/180gr Berger Disappointment
Taking some of your advice I kept trying w/ the Bergers, after having found what I thought was a good load to work with (99grs US 869 @ about 3100fps 20 thousandths off the lands). I was completely crushed after 3 four round groups failed to squeeze inside 2". I really started to think that it was me and not the bullets or gun or scope. Many 4 letter words later I decided to go back to what I know works, 92grs of Retumbo beneath a 160gr Accubond with Remington 9.5 primers @ right around 3200fps. I could not find any locally, and as I've got a looming Wyoming antelope in two weeks I was seriously considering taking my 8mm RM because at least I can shoot that rifle well. A buddy came up with 18 Accubonds, and yesterday I was rewarded with three groups @ 100 yards that looked to be about 16 mm across (most of holes touched). I was also able to kill a fat prairie dog sized laundry detergent bottle filled with water at exactly 270 yards. I came to the conclusion that my gun just does not like the Bergers.
As an interesting aside, I just had Leupold put M1 turrets on the Vari-X III 6.5-20 that sits on top of this rifle. It was very satisifying to move the turrets around and have the groups follow exactly the changes I made.
Confidence restored, I worked up a dial chart and I'll be looking for a nice doe and buck antelope past 600 yards in two weeks.
As always, thanks to all who gave advice. Eventhough things didn't work out with the Bergers, the advice was much appreciated.