I will point out the practice of my former Spetsnaz sniper that worked for me.

Didn't matter what we did that day, as long as the day was shorted than 12 hours, he would dry fire each night before the vodka came out for at least 5 minutes. We could have been on the range all day, didn't matter.

When you emigrate to Israel and you have limited space to bring stuff and you bring your sniper log book with you, that is hard core.

He is the only guy that could out shoot me 90% of the time, the other 10% was when he couldn't get enough to drink the night before.