I think you'll find a 3X-9X scope wanting in power for 50 yard matches and even 25 yard matches... My favorite for 25 and 50 yard shooting is the Sightron SII BigSky 6X-24X 42mm AO with fine crosshair/1/4 MOA dot reticule. This scope focuses as close as thirty feet for 10 meter and 50 ft range shooting as well.
For an inexpensive scope, the Simmons ProHunter Master Series 6X-24X 44mm works very well, the only drawback is it is only availible with a mildot reticule but has quickly become my #2 scope for target shooting. This scope focuses as close as 36 feetand 50 ft range is good with it but it doesn't quite focus for the range at 10 meters/33 ft...
Then there is the Weaver V series, I have the Weaver V-16 4X-16X with fine crosshair reticule however if I were to buy this scope again, I'd get the V-24 version as I find the 16X top magnification to be a bit lacking as compared to my two 6X-24X scopes...
I mention the 10 meter range even though a scope is not normally used this close however as I have an indoor 10 meter range in my cellar, my guns get tested while tuning them and I experiment with different ideas and things at 10 meters so being usable at 10 meters is a consideration for me...
Happy New Year and good shooting...
Mitch & Shadow...