I've been shooting with the Elcan since 1996 or so. Maybe 1995.
I've fired around 30,000 rounds of fullbore under them, and probably 15,000 of .22 LR.
I use a seperate .22 dedicated upper, with the same scope, and have had no loss of zero. None. The come up and over is 9 clicks right, and 5 clicks past my 500m setting in elevation, and I'm zeroed at 100m.
Swap the optic back to the .223 upper, and it's 9 left, back to my 100 zero.
I've used Gen 1, 2, and 4 bases, and the Gen 1's were less than reliable, but mine never failed through a season of shooting.
The Gen 2 that I've used (and still use on my issued rifle) has been rebuilt once, but only because every other scope on our rifle team was getting re-built at the same time.
The Gen IV that I own and use on my own AR has no problems with loss of zero, repeatability, or anything else.
Now, bear in mind, I'm a range user, not a field user, but I've worn out a BARREL before I broke the scope.
(15,000 rounds down a chrome lined bore....accuracy opened up from 1.25" to over 4.5" between 12k and 15k.)
I'm 100% satisfied with my Elcans.
(I've fired them on AR's, C-7A1's, and C-9A1's, and for S&G once, I put it on my Remington 700 too.)
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