Tagging in for some data on the 150 Berger's as well.
Good info thank you sirI've used IMR-4350 with hard to beat accuracy with the 150gr Sierra MK for my silhouette rifle, it shoots the best groups than any other powder.
For my hunting 7mm-08 H4350 has now worked best with the 150gr Ballistic Tip and RL16 on my wife's rifle. For the Bergers I'd start with these last two powders.
Stay safe
I see measurements on groups all the time on the internet. Maybe people don't know how to measure them properly. If you look at the pic, if you have 2 bullets exactly touching edge to edge, the smallest the group could be, is the diameter of the bullet caliber. So, if you have 2 .30 caliber holes exactly touching at the edges, then the group size is .308. If there is any space between them, then the group will of course be larger than .308. Same thing with any other bullet diameter.My wife and I both hunt with the 7mm-08, we have identical Rem 700 SPS Buckmasters with 24" barrels.
Both shoot sub half MOA with the 139gr SST and with the 120gr Balliatic Tip.
- 41.0gr of IMR-4064 with the 139gr SST, WLR primers.
-41.5gr of IMR-4064with the 120gr BT, GM210M primer, here a picture of this load from my wife's rifle
View attachment 180428
Currently working up a load for the 154gr SST, I'm at a 0.8" group so needs more work. I'll be trying IMR-4166 from the enduron line amd will see how that goes. Also will be developing loads for 160gr and 162gr bullets for both rifles.
My Silhouette competition 7mm-08 likes 44.5gr of IMR-4350 with the Sierra 150gr HPBT Matchking.
Hope this helps.
I see measurements on groups all the time on the internet. Maybe people don't know how to measure them properly. If you look at the pic, if you have 2 bullets exactly touching edge to edge, the smallest the group could be, is the diameter of the bullet caliber. So, if you have 2 .30 caliber holes exactly touching at the edges, then the group size is .308. If there is any space between them, then the group will of course be larger than .308. Same thing with any other bullet diameter.
Rflshootr is correct; you measure the width of the group far edge to far edge, then subtract the bullet diameter. So if you are shooting a .284 bullet and your two farthest spaced bullets are touching the inside edge, the group is .284 - still good, but not .16. A group that measured .16 would have the widest bullets overlapping each other by nearly 50% - like the top two shots in the group photo.Not if you are measuring the group center to center….