Guys- interesting discussion, thanks!
It would seem that there is something of a consensus around 100ish rounds.
It seems like some may have misinterprete the intent of my question.
Not so much of a question as to the ultimate durability really, but more around what does it take to sort out the initial bugs or defects. Really more of a question about a specific example not being 100% "right".
Myself, I have had a few scopes fail to hold zero after maybe 20-30 rounds over a 12 ga rifled shotgun. There was a sightron and a weaver Classic in that bunch.
Oddly, like John, I have this $40 Tasco from the early 90s that has held rock solid zero after more than 200 12 ga slugs. The glass is horrid but the damn thing stays zeroed.
My most recent is a zeiss conquest. Held zero well for about maybe 80 rounds on a standard weight 7 mag then almost instantly failed when I put it on my 12 ga A-bolt slug gun. Lost windage control and was spraying slugs around a 10 inch horizontal line.
Bob
