I spoke to Larry DelGrego last week; he said there are two types of shooters. I forgot the names, but one is the type who pushes the gun away from his body as he brings it up then shoots as the gun comes to his shoulder, and the other is the type who brings the gun directly up to his shoulder and shoots. According to him, the frist type of shooter wil need a longer LOP and is less sensitive to LOP as the second type.