I'm looking at this thread with much interest as I have an older Sendero in a 7mm Rem mag.
I've never tried the Berger VLDs in it yet. I have noticed that my rifle likes 150g bullets the most and the best groups that I've gotten out of it were with Nosler Bal Tips and Sierra Gamekings. Group consistancy was best using H4831SC. I also tried IMR7828, Not so good. I haven't shot them over the Chrony yet, but plan to this summer.
I've tried 162g A-max and 160g Sierras but I couldn't get it to group very well. I've tried IMR 7828 and H4831 and neither would group with multiple diffrent carge weights. I haven't tried H1000 yet, but after reading this I may give it a shot as I still have 1/2 a box of the A-Maxs and the Sierras left. I would love to get them to shoot.
I found the 215Ms today but no Berger 168s.
I have the A-Max so I will try that with H4831sc.
I also need a good set of dies with a neck sizer if anyone has some for sale.
I am using a borrowed set for now.
You don't really need to buy a neck sizing die to neck size, a FL die will work if you adjust to just bump the shoulder then back off 1/4 of a turn and set your lock ring on your die. It's always good to have that FL die, you'll have to use it after 4-5 loads to Bump the shoulder back anyway.
It looks like Midway is out of 7mm Bergers, seems they are getting harder to find....
The articles talk about the relative performance of the two bullets in general terms, and from a long range target shooting perspective. It's not the exact application you're all interested in here, but some of the material is still relevant.
Also, there is no load data included. It's just a performance analysis for the two bullets.
71.5 grs. Retumbo, 215m, Win. brass.at .010" off the lands which is 2.723 on my Stoney Point comparater gives me 3048 ave. fps for 20 shots/ 25ES and 7.7SD. All were in a hole about the size of a quarter at 100yds. Rem. 700, 7mm mag. 72.5grs. gave me 3114,3114,3123fps in a bugged hole , but there was an extracter mark showing on them so I backed off. I tried seating depths from .020" off the lands to .005 into the lands in .005" increments and the .010" off was clearly the best in all loads. The same place it likes the accubonds. Strangely the accubonds didn't care for the Retumbo. They liked 7828 best, 3100fps and vey accurate as well. I'm going to stick with that load for now and put the 180's on the back burner. I didn't see much advantage using the 180's, guessing at 2950fps. And the fit in the magazine easily, if that counts as a plus.