I use the same basic technique that I have used shooting pistols since about 1970. I take a quick breath, slowly letting it out as I settle into a final hold and apply pressure to the trigger. In our competitions there is no timed/rapid fire, so I don’t worry if the hold doesn’t seem perfect. I just take another breath, let is out slowly, settle into the shot and touch the trigger. Of course, wind and other factors enter in, but I try to shoot quickly, breathing properly, while conditions hold fairly steady.