Here's an old article by Jack O'Connor, top of second page says 1/4 minute. http://www.krtraining.com/KRTraining/Archive/HowToSightIn.pdf
Type: Posts; User: Jim in Salt Lake; Keyword(s):
Here's an old article by Jack O'Connor, top of second page says 1/4 minute. http://www.krtraining.com/KRTraining/Archive/HowToSightIn.pdf