I wish I could find the method, but there IS a way of counting sextuplets and 32nd notes. I can't remember the finer details, which is why I can't find it, but there's a method derived from Indian (from India... not talking about Native American) language. Up to speed, it's still a little less than practical, but it'll give you another tool to use while you're taking it at a slower tempo. Some players just need some kinda guide aside from their ears. Listening is good for awhile, but as was said before, the lower drums reverberate a bit longer than the higher drums. I was having that problem today. Thankfully, I'm a quick learner.

Today was my first full day of experience on a bass drum line. I'm on bass six of seven xD However, this would be my second year as a percussion instructor for a local high school, so it's not like I don't know much on the subject. The main thing is to not try to reinvent the wheel. Take it slow at first, and build it up. Patience and repetition are the main things you're gonna need.