Both my Cooper .20's (204R & 20VT) excell with any of the 32gr bullets, and almost as good with the 39gr SBK. We're talking less than 1/4" here. But it's a bit different for the 40's in both 12T barrels. Good, but not as good as the 32's, so considering the cost now of the 39gr, I just shoot 32 grainers, mostly the Nosler BT or Varmageddon flat base. Those two shoot sub quarter inch in both rifles. But I'll freely admit that the most accurate bullet in either rifle is the 32gr SBK. But due to cost, I save them for when it "really counts", and not on a regular rat shooting basis.
Besides, I really don't shoot paper unless working up or verifying a load, hair is my primary target, and the 32gr bullets really have a great explosive and launch factor on both PD's and ground squirrels. And isn't "visual excitement" really our collective goal?
