Back when I used and had Leupold's usually under 2 months.....if your using anything more powerful than a 243 just remember with a Leupold your next shot might be its last accurate one.....
IMHO it took something bigger than a .243 to get em to settle.
Varmint cartridges had one tapping turrets when zeroing.
Have sent 4 back for warranty and the last two were quoted at 5 weeks. Got em back a week or so before that.
No probs after