I have a stainless, left hand, M70 chambered in 338 Jarrett that hasn't been out of the safe in probably 20 years. Its a great shooter, 225 grn. Nosler AB at 3146fps. I also have a 250grn. Partition load at just over 3000fps. Both loads are below max and shoot under m.o.a.
Not Zeiss, but I'd like to speak up for Leica's customer service. I sent in my 10x42 Ultravids for a simple check up and whatnot. I received them back 8 days later. Cleaned, checked, with upgraded lens caps, and full documentation of all optical test ran on them. No cost to me as they are...
They work awesome! They seem to be a bit tougher than the 140's. I've used them with complete success on whitetails for over 20 years in a couple of Model Sevens in 7mm-08. Very accurate and hold together well. I've only ever recovered one. That was a head on shot to the brisket that I found...
I have 10×42 Leica Ultravids. When I bought them I also checked out 12 power glass of various makes of what I call the big three. Leica, Swarovski, and Zeiss. The Leicas just fit my eye best and i went with 10 power because I was steadier hand holding them.