I have another piece of advice: if you're set on a used custom rifle (a good decision,btw) then switching calibers will make the search more fruitful. 6mm PPC (short range), 6BR or Dasher (longer range) are widely available in BR type rifles and excellent options if accuracy and consistency are your number one objectives. Based on what you've said so far, I'd recommend a 6PPC LV rifle. 223 is widely available in FTR type rifles and is a good option for that type of competition or just target shooting and having fun. Finding a triple deuce will be a needle in a haystack.