No, this cannot be reversed as the hole pattern is different for the front and rear pairs of screw holes.
EGW only lists the Short Action Ruger M77 mount as compatible with the Ruger M77 Short Action and Ruger Hawkeye Short Action. I would recommend using the XS Sight Systems Long Rail with Ghost Ring for Ruger GunSite Scout Rifle, found by using the link below:
https://www.opticsplanet.com/xs-sight-systems-long-rail-with-ghost-ring-for-ruger-gunsite-scout-rifle.html
These Evolution Gun Works Picatinny Scope Mount, Ruger models will not work with a Browning A Bolt. You will need the long action A-Bolt model at the link below.
https://www.opticsplanet.com/evolution-gun-works-browning-bar-rifle-picatinny-rail-scope-mount.html?_iv_gun-model=browning-a-bolt&_iv_action-length=long-action
Yes. The Evolution Gun Works Picatinny Scope Mount will fit your 22 Charger.
Yes, all of our scope mounts true Picatinny and have .206" cross slots. They are compatible with Weaver and Picatinny rings and mounts.
Yes it is compatible
When mounts reference MOA, it means there is that much "tilt" built into the mount. So when you put an optic on a 20 MOA rail / mount it is physically pointed / angled upward a bit compared to 0 MOA. This is helpful for optics with limited adjustment range, or for longer distance setups.
The channel in the middle makes using iron sights fairly easy with no optic installed.