Some good points taken from the posts. thanks
A few days ago, I picked up a couple different boxes of LR primers (100); Remington 9 1/2 and Winchester 8 1/2. Didn't see Wolf brand. I'm going to load 5 rounds with each primer and keep all else the same. This weekend I'll have a chance to shoot them at 300 to 400+yds and we'll find out if either group better on paper. If one shows promise, I'll reload more and run them through the chrono.
Another combo I plan on trying is the milder primers with some H1000 I have. H1000 worked very well in a 300WM I had. (shoulda' kept that rifle but I traded it for the 7RM I'm working with now)
I don't expect any pressure issues but I'll watch for them of course. If anything, I wouldn't be surprised if one or more didn't fire because the primer isn't hot enough.
On another point mentioned is the chronograph. I recently aquired a CED M2
chrono and have found it to work very well when used as directed. (as most things do) The couple of occasions when I had suspect numbers, I was able to resolve it by reading the book and following the directions. Accuracy of the unit was confirmed when we set up 2 M2s back to back. They recorded nearly identical numbers for several different rounds tested that day; from 22lr to a 338 edge. After that, I'm confident of the numbers recorded with the M2 provided I use it properly.