The spring air rifles have a lot of oil in the air chamber and will smoke and be very loud until the excess is shot out. It will quiet down after about 40 pellets depending on how much oil there is. Your zero wont settle down until it stops smoking. It will also be loud with the alloy pellets as they break the sound barrier.
Patron Member NRA
"I would not be an old man if I had not been an armed young man." JTJ
I was taught to respect my elders but they are getting harder to find.