I had a VX1 on a muzzleloader for a few years and never had any problems with it. Wound up replacing it because I wanted a little more magnification.
hometheaterman, You questioned the poster who had all the problems with the Nikons and said he was doing something wrong....kinda like you having all the problems with Leupolds????
I personally like Nikon scopes for the glass and think they are good scopes. But there are probably more Nikon refurbished scopes out there then any other brand. That in itself makes me wonder about their reliability. That being said the Monarch UCC I owned held up great!