From 1975-90 I sold for a major gun distributor, calling on independent dealers, and I sold Leaupold,Redfield,Tasco,Simmons
Burris,Nikon,Bushnell/B&L, and the USA made Weaver. I saw and heard alot and took back scopes that were bad right out of the box. That doesn't include the ones that were sent back after being used. I never heard of a Leupold or Burris problem, only sold the Nikon for a year, but they seem OK,the old weaver K series were tough but heavy. The others had problems in all price ranges. I would rather have a Rem 788, or a Savage 340 with a Leupold than a mod 700 w/a bargain scope, it'll let you down when you need it most.
Last summer I saw R&D guys from Savage at the range testing scopes to put in the package guns. The really taeted them, and shot them first on a 308, then a 300wsm,ond 7mmmag. They had a box full of rejects.I have a lot of respect for the job they did,that company is careful what they put out. I only use Leupold,& Burris,&Leupold repaired my 2x7 when I dropped it out of a tree, N/C Thats my experience