Lemons "happen" to everyone if you slum enough rifles.
The one's I hate the most are those that shoot if you run them 200-250 fps below the cartridge's potential; but fall apart at top end.
Those things are dishonest...at least a bad rifle let's you know it's bad and is honest about it.
Yeah I know velocity isn't everything....but buying a 7 Mag and getting a hot loaded 7x57 is like buying a 3-9 variable that won't crank to 9X.