My Tikka likes the 80 SBT's with IMR-4064 also, 39.8 at 2.615 (mine seems to like more jump) lit by a CCI BR-2 primer. I'm not surprised to see them hanging well together at distance. I haven't done any targeting at this range, but I did smack a few ground-hogs wayyyyyy out there with this bullet. Great BC and sectional density stats. Does well in wind, doesn't seem to foul as much as the Nosler 70's for example, seems to be able to get through the grass tips a little without major disruption=misses, and yet when it hits it really hammers the stuff hard. I've only shot the smaller plastic tips in my 243, 55's, the 58 V-MAX. But so far, the 80 SBT (Blitz) bullet is my favorite. I do however plan to try the 75 V-MAX this summer. I think 70-80 weight is where I want to be with my 243 to keep the speed up around 3400-3500 fps for flattest possible shooting. 39.8 was like 3,375. Explosive!