But youll need some sort of reference to ensure the sight housing is centered in the peep. If not, your shot placement will not be consistant.
The 1/4" peep generally works perfect on sight housings of 2". The 3/16" peep for the 1 5/8-1 3/4" housings. To my knowledge 5/16" is the largest peep diameter out there.
First statement not really true at all. I can easily prove that by simply afixing a match to a bow with or without a peep and as long as I get the tip of the match sighted correct I can shoot very consistant. However 280Ackleyrized would be very correct saying it aids in aquiring a consistant shot placement.
Spot on on the remainder of his post. I have seen peep's drilled out larger.