the problem is that you cannot train under the most important conditions - landing actual live shots on moving human targets while being attacked or while facing incoming fire.
im not saying they arent trained, im saying it is extremely difficult and a high success rate is probably never going to be reached.
just from a quick google search;
http://www.nytimes.com/2008/05/08/nyregion/08nypd.html?pagewanted=all
"But when they do fire, even at an armed suspect, there is often no one returning fire at the officers. Officers hit their targets roughly 34 percent of the time."
"In Los Angeles, which has 9,699 officers, the police fired 283 rounds in 2006, hitting their target 77 times, for a hit ratio of 27 percent, said Officer Ana Aguirre, a spokeswoman. Last year, they fired 264 rounds, hitting 76 times, for a 29 percent hit ratio, she said."
http://ohioccw.org/200811244136/unsafe-at-any-distance-the-failure-of-police-handgun-training.html
"The average hit rate for NYPD Officers involved in a gunfight between 1998 and 2006 was 18 percent. For every five shots, four bullets missed the intended target and went somewhere else. And that hit rate is consistent with the "normal" hit rate in armed encounters which hasn't changed much for years and years.
The average hit rate for Officers who shot at subjects who did not return fire, was 30 percent. Officers hit their targets 37 percent of the time at distances of seven yards or less. And hit rates fell off sharply to 23 percent at longer ranges."
http://www.theppsc.org/Staff_Views/Aveni/OIS.pdf
"One issue illuminated by the Newhall incident was the fact that the four CHP officers fired fifteen rounds, three of which were 12-gauge buckshot cartridges, yet inflicted only one superficial wound upon their assailants. Typical of police confrontations, all rounds expended by the four deceased officers appear to have been within seven yards of their adversaries."
