The gun club is pretty affordable, but it's at the opposite end of corpus.
Found this for you:
Corpus Christi
Corpus Christi Pistol & Rifle Club
Address: FM Road 763
Corpus Christi, TX 78413
Telephone: 361-852-1212
Private: Yes
Services:
* Archery
* Muzzleloading
* Outdoor Pistol - 50 yds -500 m
* Outdoor Rifle - 500 m
* Pistol Silhouette
* Rifle Silhouette
* Skeet
* Trap
Highway 44 Shooting Range
Address: 7901 McGloin Rd.
Corpus Christi, TX 78415
Telephone: 361-265-0258
Public: Yes
Services:
* Archery
* Muzzleloading
* Outdoor Pistol - 25 m
* Outdoor Rifle - 400 yds
* Pistol Silhouette
* Rifle Silhouette
The Sharpshooter Indoor Shooting Range and Gun Store
Address: 2033 Airline Suite K
Corpus Christi, TX 78412
Telephone: 361-980-1190
Operations: 12-8~M-Sat 12-6~Sun
Public: Yes
Services:
* Airgun
* Indoor Pistol - 25 yds
* Indoor Rifle - 30 yds
* Muzzleloading
Also if you're ever down in the Aransas Pass area there's an outdoor range there called Schwenke's rifle and pistol range but you have to be a member, if you go there enough it's not a bad deal.
Unless it changed the sharp shooter is 50 yard rifle. Either that or it explains why my rifle was shooting high...