I'm new to IPSC, only been in two matches at OKC gun club. 1st time I used my XDm 40, ( 4.5) had no problems and had a blast. Have about 3000 rds thru it, so I feel pretty comfortable with it. 2nd match I took my XDm 5.25 .40 It also ran flawlessly, the biggest problem I had was getting a fast sight picture. It does not have a three dot picture like most. Ok, here's the question, should I be patience and let it come to me with practice, or change the sights...and with what? I also shoot Limited , is that a good class for a newbie , using the 5.25 (.40 )