"Acceptable" is the key word in your question. As Dave noted,your gun would be legal for both ICORE and USPSA, it would also be legal for IDPA. In fact it would be much better suited to IDPA, than the other two. For ICORE and USPSA, the 5" barrel is much better suited to the longer distance shots you might encounter. If you have your mind set on ICORE or USPSA competition your should have no trouble finding someone willing to trade a 625 with a 5 inch barrel for your 3" version. The longer barrels also work well for both of those sports but tend to get a little muzzle heavy.