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Yeah, I must admit, I've never been incredibly good at expressing stats in decimal form when it comes to 40k mathhammer. I always have to do the math in my head using increments of 6.

For example, 6 rapid-firing bolters should hit 8x and would 4x against T4 models.
If the mathhammer is not divisible be 6, or can be halved, I rely too much on rounding.

On the bright side, this has lead me to often do the math in a way that seems to account for "bad dice" and thus I am rarely in a poor position.

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