A good question and interesting replies. I have variable scopes but they are set on x7 and don't move. Maybe I should get a x7 non variable scope? Indeed HFT does not let you change the magnification once you start the shoot.
Strange how fashion changes as well. I remember not many years ago when x10 fixed 40 or 42 was all the rage for HFT and 'all serious' shooters swore by it. That now seems to have changed and 32x7 seems the fashion for many (most?) shooters.
Cheers, Phil