I have a Bushnell Elite 6500 1.25-8x32 on my Ruger Scout rifle, using the original short rail which came with the rifle. At the moment it is in 30mm Leupold QRW Medium rings, with the quick release levers on the left side. These sold for $74.94 at Ellwood Epps. I have since obtained similar Low rings low rings, but because the medium works so well, I have not replaced them. My first of these scopes set me back over $600, but then I found a few at LeBaron for $372.94! I have also used ones on my 9,3x62 Tikka and my 375 Ruger Hawkeye.
This setup allows me to keep the ghost ring, and on the 1.25x use the scope as in a scout rifle. The rear ring has the crossbar in the very rear groove on the rail, and the front ring in the 4th cross groove. For my eyes the scope works well to a magnification up to about 5x, then a black ring starts showing in the rear lens, because the scope sits well forward. If I take my time, and even when using bags / rests, the 8x works well. I am 6'2" tall, so a longer neck helps.
Also, I have not added any spacers and shoot the rifle as it came in March last year. I have just obtained "plastic" mags whith the dust covers. I like these better, having rounded corners, and being much cheaper.
The main advantages of this set up are:
1) No need to buy another rail. Can buy more ammo
2) The short rail is lighter: No need for more weight on a 308 rifle
3) The action is more open and not clutered by the extended rail: this makes it much easier to load ammo into the open action (see page 16 of the Ruger manual), one of Jeff Cooper's original requirements of a scout rifle.
I also make a point of transporting my rifle to the range with the scope removed. I then first fire shots using the open sights / ghost ring, and then replace the scope and fire some more. This way I get used to replacing the scope, and can get used to any changes in POI. Point Of Impact does not change significantly for normal hunting use.
With 150gr Accubond reloads, the rifle is consistent Sub-MOA over a rest.
Enjoy your Ruger Rifles