This is a discussion on Carpenter Bee in flight within the Invertebrates | Insects forums, part of the UK Wildlife category; Very good shots keep the coming....
1/320 i tend to use 1/400 when possible for handheld, but i have been using the 400mm lens its a big heavy to try and hold steady for macro/close up shots. Ive got a 100mm macro lens then i have recently purchased so just need to use it more.