I have one on a Contender 45-70 with no problems. I have a few Nikon pistol scopes and many Nikon Monarch and Buchmasters on some of my Rifles. I like them a lot. My Nikon 4.5x14 survived lots of snow and cold in Colorado. Never hada failure yet. It is on my 338 Win Mag. I am not sure why, but I have never had all the probelms with any of my scopes as mentioned here on this site. I have soem really heavy recoilers too. I have a variety of Bushnell, Simmons, tasco, Leupold, Burris and Nikon. I still consider my Leupolds to be my favorite, but its probably only because I have been using them the longest.
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BullElk Hunter (Gerry)
Life Members NRA, RMEF, NAHC, NAFC,
HHI Member #2933
Ridin a 2010 Road King
103 Stage-2 255 cams,
Vance and Hines 2-1 Pro H.O.
105hp; 110 ftlbs