Getting started
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There's a lot of information  on the Internet about getting started in IPSC.  I've just completed my first year of competition and as a beginner I found the information available to be basically factual but incomplete.

If you want to simply have fun, shoot with the IPSC guys, go to a couple of local fun shoots, all you need to get started are the following basics (and your black badge):

                             -  A pistol that is on the IPSC approved list.
                             -  A holster that covers the trigger.
                             -  At least 3 magazines
                             -  Magazine holders
                             -  A single stage reloading press unless you can afford to shoot
                                factory ammo. 
                             -  Ear and eye protection.

If you want to try and shoot competitively at various qualifiers (competitions) you'll end up with the following:

                              -  A decent competitive pistol that won't break down and you can get
                                 parts for. 
                              -  A two piece innner and outer velcro belt so that you can go to the
                                 bathroom between stages etc.
                              -  A good holster that will keep your gun secure without falling out and
                                 allows for a decent draw.
                              -  At least 5 mags.
                              -  5 mag holders that will fit on the outer belt.
                              -  Decent ear protection because after two days of  wearing  bad
                                  earmuffs your head will feel like its been in a vice.
                              -  Good eye protection.
                              -  3000 to 5000 rounds of copper jacketed bullets and powder (some
                                  of the guys are putting 10,000 plus rounds a year down range.
                              -   A progressive reloading press because loading the above on a
                                  single stage is torture.
                              -   A powder scale to measure powder when reloading.
                              -   A Chronometer to measure the speed of your bullets (unless you
                                  can borrow someones).
                              -   A good range bag to haul your stuff around in.
                              -   A shot timer to practice with.
                              -   IPSC targets at a $1.00 each as well as patching tape and stands
                                  if you want to practice alone.

After spending all that money on equipment, add in IPSC dues, Match fees,  hotel costs, eating out and transportation costs..  Finally you have to decide if you've got the time and commitment to compete.  I'll quote Marlin Kachmar, one of B.C.'s top shooters who said "It's a lifestyle".