Originally Posted by
Hoser
Watching a few guys last weekend shoot their 223 bolt guns made me get the itch to yank off the 300 Whisper barrel off my Bighorn action and screw on the 223 Ackley barrel.
I had not done much load development with it, pretty much just fireformed brass. 223 Ackley and 300 Whisper both feed flawless out of Accuracy International 223 mags.
I went to the range with a bunch of test loads. 24.5 - 26.5 gns of Varget under a 80 gn Sierra. I wanted to try Varget because I have a lot of it.
The 26.5 gn load easily put 5 shots inside 1/3 of an inch at 100 yards. It chronographed out at 3010 fps with a low ES.
Going to load up a small batch and see how they shoot at 400 yards.