The BKL ‘s are not BR quality rings IMHO simply because the bases require too much spring pressure.
.
What is "too much spring pressure"? That is a term I am not familiar with.
I have seen a lot of BKL in use with no issues, here it a link to their site so that perhaps you can explain to me what it is you are referring to.
http://www.bkltech.com/1inch-Scope-Rings-and-Mounts-for-3-8-and-11mm-Dovetail-s/57.htm
drover