Target scopes: Redfield 6400 or Weaver T-20?

[Calfed]

Anyone familiar with either or both?

Wondering which has better glass, more repeatable adjustments, holds zero better, etc.

Thanks

 

[nervous]

I have a T6, T10, T16 and T20. They all have repeatable adjustments that compare with my Burris, Steiner and older US Optics scopes.