Range report after install of scope, 1" Decelerator, and Graco recoil reducer: Great session in beautiful 60 degree weather today! Fired a total of 17 rounds of Hornady DGX 400 grain factory loads from the bench with no ill effects (just a t-shirt; no sissy pad, etc.). First 3 without scope to check irons after filing them down since they were a bit high initially. About 2.5" low with a 6 o'clock hold at 50 yards; must've filed a little too much
Still, close enough if I ever had to rely on the irons, I think.
Then put the scope back on and got on paper at 50, then at 100. Then fired the two groups in the pics below. I have to say that I was surprised. I guess I didn't expect the rifle to shoot this well at 100 yards with a 2.5X scope! I also chronographed the Hornady 400 grain DGX factory load, and it came in 100 fps below the factory quoted figure. I only got 1,945 fps average for 3 shots. Oh well, I plan on working up a handload with Swift A-Frames and/or Woodleigh softs at about 2,150 for my go-to load. Will update when that's done.
In the meantime, I'm stoked about the accuracy of the ammo and rifle. And, according to Kevin Robertson's book, "Africa's Most Dangerous" (which is excellent, BTW), the original .450/.400 3" ammo actually ran at about 1,950, and accomplished some pretty awesome things at that velocity.