If you are new to Cowboy Action Shooting don't worry too much about your outfit. The point is to shoot, make friends, and have a GOOD TIME. Some shooters tend to keep things on a basic level and never really get much into costuming, and that is ok. However, clothing, boots and hats can be one of the most fun things about this sport!
Boots - When shooting weekly matches and spending long hours standing on the range your priority is to find comfortable boots to wear. Packers are comfortable and give good ankle support. Stove Pipe boots look great, but are less comfortable after long hours of wear, so I save them for reenacting and wear Packers for regular competition so my feet don't hurt. The good thing about Packers is that you can find them easily at your local western store. If you want Stove Pipes you will have to order them online.
Hats - Hats of the Old West were typically made of beaver felt. Top hats were commonly worn by well-to-do town folk. Bowlers and derby's were worn by town folk as well as lawmen, bankers and outlaws, such as Butch Cassidy and the Sundance Kid. Cowboys and ranchers typically wore larger brimmed hats as this was sometimes their only means of shade from the sun. There are many different hats for many different looks, and the choice really is up to you which way you want to go. Being that a lot of cowboy shooting matches are held in hot weather, straw hats are commonly worn in the summertime and are acceptable at shoots.
Clothing - A great resource for finding cool vintage clothing are your local second hand stores like Goodwill and the Salvation Army. You'll be amazed at how much you can find there.
SASS provides a directory of links to retailers of clothing, hats and other cool stuff. If you have the time you can easily spend hours shopping through these links. Here I have collected together some of my top favorites of the best clothing, hat, and boot suppliers I've found to date.