Below are some external links that might be of interest to you.
Middlesex Sport Shooting Center Facebook page contains the latest action at MSSC.
The National Rifle Association is the voice of gun owners across the nation. You will need to join if you wish to get certifications, as they maintain your test results
The National Skeet Shooting Association has information on everything skeet including competitions across the country.
The International Practical Shooting Confederation focuses on speed and accuracy, be it pistol, rifle, or shotgun. If you are looking for competition across the county, along with rules, you will find it here.
If you are looking for details regarding competing in the Olympics, USA Shooting is the organization to get more information.
For information on firearm laws in Virginia, the Virginia State Police maintains a Virginia Firearms Regulations site.