Oh, and just to let you know, I was in my blind yesterday evening, waiting for the whitetail bicks to show up (they were no-shows for the second evening in a row), and had about 200 swallows flying around me. Remembering your post, I tried to get a BIF of some.... WOW! Now I understand why you are still trying to get a good BIF shot of a swallow! No I can join the ranks of "still trying"!
Yes Dave, swallows are fast. Excellent background, pretty little bird that usually we don't pay too much attention to probably because they are so fast ha ha!!! Here's a swallow I got perched a while back with my backup camera (d7100). I use the d7100 sometimes when the light is good for getting more pixels on the bird. Of course my d4 gets most the work.