Inconsistent - SIG SAUER Bravo5 5x32mm Prismatic Battle Red Dot Sight

Does not hold Zero after 200 rounds, have to re zero the unit. I am not firing on rapid fire, just normal cadence from 100 - 300 yards, on 6.8 SPC II - not a heavy recoil here. There it goes for Chineses assembly, Sig Sauer! Since Bravo4 on my other rifle holds steady for 600+ rds now, no other conclusion here given Bravo4 is made in Japan.. Disappointing. Other reviewers, do update everyone on how many rounds has it gone through when you say it holds zero..Beware folks.. I have not seen any negative reviews for Bravo4 I also own, draw your own conclusions