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.
"I would not be an old man if I had not been an armed young man." JTJ
Patron Member NRA
"As democracy is perfected, the office of President represents, more and more closely, the inner soul of the people. On some great and glorious day the plain folks of the land will reach their heart's desire at last and the White House will be occupied by a downright fool and complete narcissistic moron."
--- H.L. Mencken, The Baltimore Evening Sun, July 26, 1920