I recommend using the Butler Creek Flip up caps for the SightMark Latitude 10-40x60 Benchrest Rifle Scope. You will need Butler Creek Scope Cover size 51 for the objective lens and size 20 for the eyepiece. These scope covers can be found at the links below.
https://www.opticsplanet.com/butler-creek-flip-open-scope-covers.html?_iv_objective-lens-diameter=65-dot-4-mm
https://www.opticsplanet.com/butler-creek-eyepiece-flip-open-scope-covers.html?_iv_eyepiece-lens-diameter=45-dot-1-mm
It depends on the scope base and whether your rifle has a heavy or bull barrel. However, I recommend using a set of extra high 34mm rings for the SightMark Latitude 10-40x60 Benchrest Rifle Scope. The rings at the link below should work.
https://www.opticsplanet.com/talley-34mm-tactical-ring-black-armor-extra-high.html
Mansfield, TX.
Yes. You should be able to see a target of that size no problem with this scope.
Unfortunately, this does sound like an issue with the optic. We'd recommend contacting the manufacturer for options.
https://support.sightmark.com/hc/en-us
As it is a Second Focal Plane rifle scope, all values are true at maximum magnification.
SightMark offers a limited lifetime warranty on their products, excluding night-vision, as this has a different warranty.