When it comes to loading for pistols, will changing the OAL have a significant effect on accuracy? I have noticed that changing the crimp does affect the spread of a group shot at 25yds; sometimes just a few thousands of a difference will produce marked results. But can the same be said of changing the OAL? I am currently loading my 9mm rounds to 1.125" but I have noticed that a lot more people prefer 1.135". Is this something that is being done to improve feeding reliability or is there another reason why a longer OAL is preferred?