The 52gr A-Max bullets shot better out of my Broughton 12 twist (.223) than any other bullet that I tried, including several match bullets. At thiis point I have only shot paper and don't know how they perform on varmints. I'll have to wait until the spring to provide some terminal performance reports on the A-Max.
I've had slightly better accuracy with Nosler B-Tips than with Hornady V-Max bullets but they both get the job done reliably.
All-in-all I killed more fat PA groundhogs with the Sierra 52gr HPBT bullet, launched from a 22-250, than with anything else. Groundhogs died instantly but were not "blown apart", if that's what your looking for.
If you're looking for "blown apart" lol. Try 52gr. Speer Jacketed HPs at around 3500 to 3750 fps. I shoot them out of my 22-250 and my 220 Swift. The accuracy load with both guns happened to be with these bullets. Although later, I found out that the 22-250 likes the bergers a tiny bit better lol; terminal performance isn't quite as good tho.
Some tuff peramiters you set down for the perfect load.
For sagerats I much prefer 27.5 of Tac and a 40 grain VMax but its loseing a lot of gas by 400 yards. Have taken a couple of rockchucks with this load but prefer a heavier bullet! (the 243 shootin 55s or 75s works great for chucks!).
__________________ "Make everything as simple as possible, but not simpler." -Albert Einstein (1879-1955)
Because of wind in our area and distance that shooting will be done the 52gr bullet looks to be a good choice for sage rats and the rockchucks same as woodchucks.....
What are you thoughts, and have you shoot the 52's out of 223 ........