I've shot plenty of them with the .243 in various bullet weights and that seem's about right for the 70gn Ballistic Tip. I never could find a really accurate load with that weight in my .243 (Win M70 HVB).
I shot the 65gn VMax a bit when I lived in Virginia and used it on crow and groundhogs. That was a explosive bullet inside 300yds but lacked the moxey for dealing with the wind when attempting longer shots. My hit to miss ratio improved when I went to the 80/85gn range and got even better with the 90/95gn bullets.
Those juice carton's are a little bit softer than those crows, especially in the long, tough feathers of the wings. Not that you need to worry about shot placement on a crow but that's not exactly apples to apples.
Killing crows is a hoot, especially when there's a murder of 15 or more on the ground. I like to set up on them, get the range of one bird, dial in and wait for another to walk behind him and then squeeze. They go crazy! Two birds with one shot, I smile everytime I re-live that.
If they haven't been hunted alot they usually fly around all crazy, and low, cawing at the flopping birds. I imagine their saying "get up Larry, get up Joe", "what's wrong?" My mind swings to Slyvester Stallone's twisted, crying face in the "First Blood" movie where he's setting in the sporting goods store telling Col. Troutman about his buddies getting shot in Vietman (no disrespect intended).
Sometimes a couple will actually land to get a closer look at their deceased partners. Bad on them, cause I'm usually waiting for that and another one get's dusted. After that they head for quieter fields! Hope you enjoyed that, I did.