I shot a moose with em. Yea, they are very good. I never could get them to group the way I wanted. I got 1.1-1.5MOA in my 300RUM, but got less than 1MOA with accubond.
I have seen on huge animals where they might not penetrate all the way. They mushroom very reliably and stay together equally reliably and some speculate causes it not to penetrate as well on moose. Where a partition would.
A friend of mine shoots factory-loaded A-Frames (Remington Safari Grade ammo) in his .300 Win Mag. The accuracy is excellent, about 1.5" at 200 yards. He's never recovered a bullet from a game animal, but the ones we've dug from the backstop have been perfect mushrooms and have held together.
I am really impressed by the Swift A-Frames. I plan to load them in the .375 H&H. I don't plan on shooting them in any great quantity, and the price isn't too much more than the cost of Nosler Partitions.
Even in small bore high velocity rifles, these bullets have some serious penetration. The 120 grain .257 almost went through a big mule deer end-for-end. Looked like it could go through two elk standing broadside.
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A man has got to know his limitations . . . . .