Hi Parsons,
Short answer: if you're doing Plains Game it's really hard to beat something like a Leupold 1.5-5x/1-6x24 scope.
Longer answer: I used a 2.5-10x42 scope on my first Safari. The make is irrelevant (Zeiss Victory FL), what actually was more important is that the added power was more of a hinderance than a boon. I shot my first Kudu at 280-ish yards with the scope set on 4x. The second kudu was at 287 yards and the scope was on 3x. I had no issues getting on target.
In fact, it was the Blesbok that really taught me the value of low power. I'd turned the scope up to 10x earlier in the day and didn't turn it back down. I ended up late in the day on the sticks with Blesbok coming in...and didn't realize it until the dang Bok's were 30 yards out. All I saw was shoulder...made it hard to pick the right Bok out from the file of 30 of them.
I certainly didn't need the light gathering capabilities of the x42 bell either - hunting was done when the sun set...and we boogied to the Bakkie as quick as we could when the sun went down. If I were hunting leopard into the absolute last hours of the night I could justify the value of the x42 bell...but for normal hunting, spot and stalk during the day? Nope...
And therein lies the truth: for hunting in normal PG conditions I'd want something between 4-6x that's light weight and user friendly with an easy to use reticle.
This year that's going to be a Leupold FX3 6x42 fixed power scope, with the LR duplex.
In my perfect world I'd want a VX6 1-6x24 e-dot with an LR dot #4 reticle (*dots set for use on 6x). That Reticle doesn't exist though...I can get a #4 with an elevation turret...but spinning a turret isn't quite the same thing as the LR dot plex. That adds complexity I don't want.
Rnovi, Bassasdaindia and Parsons,
My first scope (I was 18 years young) was a Redfield 6 to 18x (on a Model 722 Rem in .244 caliber) and while hunting vermin in Nevada, I had more than one incident like your blesbok encounter.
Finally, I gave up and left it on 6x always (and it still bagged plenty ground squirrels, jack rabbits and coyotes, at short, medium and longer range).
Therefore I cannot abide variable scopes (too many moving parts for my ADHD eccentricities to keep straight).
Even for longer shots at most deer and PG size animals, I personally would have little need for anything over 6x in more open country (prairie, grassveld, desert) and 4x has so far been plenty even for that.
Not sure if Leupold still makes their 6 power scope with the 36mm bell or not but that one was a good scope for me pior to moving to Alaska, 30 something years ago (around here, a 4x is more than enough, even on the open tundra for caribou and such).
Likewise, during my sordid youth/prior to moving up here to AK, I had put together a Ruger 77, in .257 Roberts, with a 3x Leupold (no longer made as far as I know), for shooting running jack rabbits.
However, with it, I shot very dead a standing coyote (from sand bags on the hood of a pickup truck) at a bit over 400 paces (across a dry pan).
3x was plenty evidently, and it's endorsed by bassadaindia for African PG hunting as well.
Cheers,
velo Dog.