 For a 2011 pattern handgun, aftermarket parts and magazine tuning can increase the (reloadable) capacity from 14 to 18 rounds for .45 ACP, from 17 to 21 rounds for .40 S&W and from 20 to 24 rounds for 9x19 mm.It is common belief that major scoring using the .40 S&W will give better scores for most competitors over the 9x19 mm, but at the cost of more expensive ammunition.The power factors for Limited and Standard also differ.