Yes, this is a standard rifle scope built to handle heavy recoil, so it can be mounted on a .35 Whelen single shot rifle using appropriate riflescope rings.
Depending on which specific Henry, a 1-piece picatinny rail, and a set of the high-height Pro-Series 30mm rings would do the trick!
This will indeed! We'd recommend a 1-piece picatinny rail, and a set of our high Pro-Series 30mm rings!
On this rifle, you will need to run the Pro-Series 30mm High Rings, PN# PR30-H!
This could be utilized on the Smith and Wesson 1854, but would require 30mm extra-high rings, and would be a less-than-ideal fit.
This scope can absolutely be utilized on your deer rifle!
On this rig, we would recommend our Pro-Series cantilever mount, 30mm. PN# CVP-30!
I would recommend using a dedicated 1-piece scope mount such as the Aero Precision Ultralight 30mm Scope Mount (linked below). This mount is designed to mount the optic at the ideal centerline height for an AR pattern rifle and allows for enough clearance for up to a 56mm objective lens.
https://www.opticsplanet.com/aero-precision-ultralight-30mm-scope-mount-extended.html
I would recommend using the Evolution Gun Works Picatinny Rail Base paired with a set of Extra-High height scope rings like the Vortex Pro Series Rifle Scope Rings. Both the base and rings can be found linked below:
https://www.opticsplanet.com/evolution-gun-works-hunter-remington-ultimate-muzzleloader-short-action-picatinn.html
https://www.opticsplanet.com/vortex-pro-series-30mm-riflescope-rings.html?_iv_tube-diameter=30-mm&_iv_ring-height=extra-high-1-dot-54-in,extra-high-1-dot-54-in-1
This optic is capable of being mounted on just about any centerfire cartridge, up to and including .50BMG. The key to success is quality rings and bases, at proper torque values!