Scopes, it's a subjective matter, but I'll try and give some of my thoughts.
You have a SS10x42. It's a good scope.....................................for the money.
Realistically, they should cost more. What I don't like about them is the fixed power, the 10x magnification and the reticle's subtension. That is, the reticle's too thick for my liking and covers too much of the target.
There's plenty of choice when it comes to scopes.........at first appearance. But this soon narrows down when you start looking at preferences.
I assume you want a mil-dot? There are some good reasons for choosing a mil-dot.
It's range finding capabilities for one, although you need to study and learn how to use it correctly.
Personally, although I have several mil-dot scopes, I have never had to use this facility as most of my shooting is at known distances. But they're nice to have, if only for using the extra dots for "aiming off".
If you still want a mil-dot, then the choices become a little more limited. Here are some of the choices.
Nikon
Swarovski
Unertl
US Optics
Leupold
Schmidt & Bender
If you go through these, you'll find the following:-
Nikon, Value for money scopes, not much choice in models. Poor availability in the UK.
Swarovski, Expensive but good. Limited models, fixed power.
Unertl, Rock solid, expensive, fixed power 10X.
US Optics, tough as nails, very expensive, big and heavy for what they are.
Leupold, plenty of models, value for money, excellent quality, some eye relief problems.
Schmidt & bender, legendary optics, good choice of models, expensive and a bit heavy.
When choosing a scope, I look for the following.
Vari-power, adjustment range, parallax, cost, quality and to some extent.....weight.
I think this narrows it down to two manufacturers, Leupold and Schmidt & Bender, but they both have their pro's and con's.
Leupolds have plenty of models to choose from, especially if you're looking for a Tactical model.
They are relatively light compared to other makes, most have parallax adjustment, a good power range and ample windage and elevation adjustment.
They are also competitively priced.
Schmidt's are very similar, although they are heavier they have a higher quality optics clarity, but are more expensive.
In comparing the two, I would choose the Leupold 4.5-14X50 and the Schmidt & Bender 3-12x50.
These both have side wheel parallax adjustment as opposed to objective bell adjustment. It meand you can adjust the parallax from your shooting position much easier.
The Leupold has 1/4 MOA clicks, which aren't really necessary, whereas the Schmidt has 1moa clicks, which are a bit too coarse. 1/2moa is more useable. You can adjust the Schmidt in 1/2 moa changes though, but you can do that with the Leupold too..
Schmidt,s usually have only one turn on the elevation drum for about 46moa adjustment while the Leupold had multiple turns, for a total of about 80moa adjustment.
Bear in mind, you'll only need about 17moa max to get from 100-600yds and about 45 moa to 1000, depending on ammo and calibre etc.
No scope that I know will give you that range of adjustment though, unless it is painstakingly fitted and canted correctly to the rifle.
It's possible to get "lost" with a multi-turn turret, but if you take care and mark your base zero and no-wind settings, it'll never be a problem.
The Schmidt has clearer and brighter optics than the Leupold, but I've never found this to be a hindrance, and likewise, the Leupold's are more critical with eye relief, but I think this tends to make sure you have the same cheek weld for each shot, whereas the more flexible eye relief on the Schmidt's can encourage sloppiness on the shooters part. I could be wrong though..
Essentially both scopes offer the same performance, albeit in different ways, and they are very comparable. But I think that the Leupold's slightly more critical eye relief and "lower quality optics" are more than offset by it's much lower price. I think they're better value for money, and they've helped me to do a lot of winning over the last few years.
Ideally, you should look for a scope that winds down low enough, 3-4x, to allow reliable offhand-short range performance and high enough, 10-15x, to be able to see more precise aiming and bullet splash at longer ranges.
Mark
ETA, If you want an all-round scope, I wouldn't even consider the ACOG's. They are too limited.
They don't allow precise aiming, basically they're designed to be able to hit a 19"x36" target.
They do this very well, but they are a battle sight and there's no windage allowances with them.
Besides, there's no guarantee that the reticle sub-divisions will match your ammo at all ranges.
And before anyone starts....I have two.
ETA again, consider this....most of the Western countries Snipers use either a Leupold or a Schmidt & Bender. That must say something.
Oh and I forgot Nightforce, but I don't like their length and 10MOA per turn drums