by Tom Gaylord, a.k.a. B.B. Pelletier

This is a subject that is dear to a lot of experienced shooters and a turnoff to younger shooters. Peep sights are a blessing to those who have discovered how easy they are to use, but they are avoided by shooters who aren’t familiar with them. The common misconception is that a peep sight is somehow more complex than a traditional open notch rear sight, but the truth is that the peep sight is actually simpler and faster to use than the open notch.

With an open notch sight, you have to align the rear notch with the front post. There can be several different variations of how it works, such as post and bead or squared-off front post, but the process of using them is the same for all of them. The rear element and front element must be aligned, then held against the target in a certain location (i.e., 6 o’clock hold or center hold).

With a peep sight, you don’t do that. You just look through the rear hole and align the front sight element only against the target. Your eye uses the peephole to adjust your vision by forcing your pupil to adjust for the best depth of vision. It’s an unconscious and automatic response to looking through the small peephole; and, if you allow your eye to do its job instead of fighting it, your brain will help you obtain a more precise sight picture than with open sights.

There are shooters with remarkable vision who can sight with open notch sights extremely well. But if you don’t have great vision, and by that I mean if your vision is average or worse, the peep sight should work better for you. But that’s only for those who don’t fight the rear sight and just look through it.

Peephole sizes
Today, I want to address something that I’ve seen discussed a lot on the internet, and that’s the size of the peephole. I see that many people feel the hole must be large or they cannot use it. Indeed, I’ve seen several peeps that have been drilled out by their owners. The fact is that there are good reasons for both large and small peep holes.

Large peepholes
Large holes allow more light to pass through; and, when used, they acquire the target faster. They’re used on American military arms like the M16, the Krag, the 03-A3 Springfield, the M1 Carbine, the Garand and many others. They’re also found on slug guns used for deer in brushy forest hunting situations where speed is more important than precision.

The M1 Garand peep is about average size for a battle sight.

The 03-A3 sight adjusted for windage as well as elevation. Not all of them did. I can shoot MOA with this sight.

The M1 Carbine peep was a rough and ready sight. The rifle wasn’t that accurate, so the sight didn’t need to be precision.

No. 4
The battle sight in this No. 4 Enfield is huge. When the sight standard flips up there is a hole less than half this size. It adjusts only for elevation.

Can such large holes be precise? Yes, they can. I have shown you at least one one-inch five-shot group shot with my 03-A3 Springfield at 100 yards. But the norm would be a larger group. Even the Garand would shoot about a two-inch group at 100 yards on most days. Your goal with a large peep is minute-of-bad-guy.

One secret I’ve learned about using a large peep hole with greater precision is to hold the sight away from my eye. The farther back I place my sighting eye, the more precision I get from a large hole. I didn’t invent that idea; I learned it while shooting the Buffington peep sight on my Trapdoor Springfield that was made in 1875 (the rifle, only — the sight didn’t come about until 1884). The Buffington sight puts the rear peep hole about 14 inches from the sighting eye, and the hole is not that large. You would look at it and imagine that you could never use such a sight, but the truth is that when there’s enough daylight that peep gives precision that rivals the finest tang target sights found on target single-shot rifles. The reason is because of how far the hole is from your eye.

Col. Buffington designed this rear sight that combines a peep (several, actually) and a notch. It can be used for long-range precision fire. A great many buffalo fell to this sight on this rifle.

Small peepholes
A small peephole passes less light and forces you to hold your sighting eye closer to the hole to see the sight picture. Many sights with small holes also have some kind of flexible shade to shield the sighting eye from light that’s not coming through the peep hole, thus sharpening the sight picture noticeably.

FWB 300S
The precision FWB peep sight has a large rubber light shade to keep the sighting eye in the dark.

Crosman 160
Crosman mounted their version of a Mossberg S331 peep sight on the 160 target rifle. This sight, alone, is worth at least $75 today. Notice how small the hole is. That’s what’s needed for precision.

Small peepholes take longer to use but provide a more precise sight picture. Use them when fractions of an inch are important, such as when target shooting or when hunting game at longer ranges such as 400 to 600 yards.

This is Ballard’s mid-range peep sight mounted on the tang of my Ballard rifle. My eye is so close to the hole that I push the sight forward when the rifle recoils.

The secret to using a small peephole is to get as close to the hole as you can. Do this even with recoiling rifles. My Ballard, for example, is in caliber .38-55 and kicks about like a 30-30, yet I put my eye less than an inch from the peephole. I have to because it’s so small that I couldn’t use it if I was much farther back. When the rifle fires, my forehead always folds the sight forward as the recoil brings the gun back. That’s how I know I’m using the sight to its best ability. Of course, if the sight doesn’t move when you hit it, you don’t want to do this!

When my FWB 300S target air rifle comes back in recoil (the action moves in the stock to cancel the feeling of recoil) the rubber eyepiece always pushes against my eye. That’s how I know I’m sighting correctly . It works okay on that rifle, but my HW55CM comes back a little too aggressively, and I’m more cautious about holding that sight close to my eye.

Use BOTH eyes!
It is of paramount importance to keep BOTH eyes open when using a peep sight. If you close the non-sighting eye, the peephole will also close up. It’ll do so variably, depending on how much you’re squinting to close the other eye, and the result is you no longer have a round hole to look through. I told you about the man who was shooting the M1 Garand a couple weeks ago and was closing his off eye. He was getting 12-inch groups at 100 yards from a rifle that was probably capable of groups one-sixth that size.

If you want to see how this works, take a piece of card stock and poke a hole in it. Look through the hole with both eyes open (one eye looking through the hole and the other eye just open). Then, as you’re looking through the hole, close your non-sighting eye and watch what happens. The hole seems to close up! That’s what you are doing when you close your non-sighting eye while using a peep sight.

Peep sights are an advancement over open sights. They don’t work for everyone, because those with severe eye problems often have trouble using them. But the majority of people can use a peep sight and obtain better accuracy with less time spent if they don’t fight the sight. They’ve been used on all American military battle rifles since 1884; and though the move is now toward optical sights, a peep will probably remain as the backup sight for some time.

If you’ve never tried a peep sight, you owe it to yourself to give it a try. Use this report as a primer for learning how to use the sight and see if it doesn’t give you greater accuracy with less work.