What is a Fletching Jig (tool)?

7 Archery Plunger Related FAQs

What the heck is a "Plunger" anyway? That's what I asked myself and thought it was worth investigating and writing about. I'm sure later in my archery journey this topic will seem quite elementary. But as of writing this post it sure wasn't.

In this article I'll explain to you what it is, what it does, and why it's even on your bow.

What is an archery plunger?

"A Plunger Button is a fine tuning device with an adjustable spring cushioned tip inside a housing. The plunger button is installed on the riser with the tip protruding above the arrow rest and its purpose is to push the arrow to the left, on a right hand bow, to compensate for archer's paradox.

The side of the arrow is in contact with the plunger button tip when the arrow is sitting on the arrow rest.

The spring is tuned to allow a certain amount of movement of the arrow towards the riser on release of the arrow, bringing the arrow to the ideal "centre shot" location.

The plunger button is used to compensate for the arrow's flex, since the arrow flexes as the string pushes onto it with a very high acceleration, creating what is known as the archer's paradox.

A recurve must have a threaded hole or sleeve in the riser to accept a plunger button.

The arrow rest needs to be positioned so that the centre of the arrow and the centre line of the pressure button line up.

Fine or micro tuning of the plunger button is arguably one of the most critical steps when tuning the recurve.

The tip of the plunger is susceptible to extensive wear and to prevent tips wearing out, some tips are made of durable materials like Teflon.

Invariably new archers cannot justify spending a lot on a plunger and opt for the entry level model, which is at the right price but its tip wears quickly and replacement tips are not available, so a new plunger must be purchased.

Similarly, the spring on an entry level plunger will be rough or not press in smoothly as it is built to a price with cheaper springs that do not hold up over time.

Better quality buttons are much easier to adjust as the springs are made of far superior quality and can take the stress of micro adjusting and they never relinquish their tension.

Once the plunger is fine tuned, rarely would the button need to be re-adjusted. A high quality plunger button is an excellent investment as it will last a lifetime.

Greater accuracy comes with quality buttons. It is claimed 4 out of 5 Olympians use a Beiter plunger button.

The plunger is also known as a pressure button or Berger button, invented by tournament shooter Norman Pint, but named after well known archer Victor Berger."

Source: AbbeyArchery.com.au

Related Video: Recurve Archery - Plunger Button Explained

What is a Berger button?

"Technically, a Berger button is also known as a plunger button.

Usually, folks are referring to the Berger hole. Every compound bow comes with two sets of holes on the riser, just above the riser shelf.

If you were a fingers shooter, then you could install a plunger button in the Berger holes.

Most folks just use the hole to install the bolt that holds their arrow rest."

Source: Archery Talk & Bow Hunting

What is an archery cushion plunger?

Cushion Plunger Arrow Rest 

"My recurve bow came with a cushion plunger. I was wondering what its use is, how I would set it up, and if they are necessary or not.

The plunger button does a couple of things. You can move it in or out to ensure that when the arrow is sitting on the rest it lines up perfectly with the string and is pointing straight. Secondly it acts like a shock absorber, damping out the natural tendency of the arrow to wobble.

Have a look at some slo-mo archery videos on youtube and you'll see what I mean.

It's not "necessary" in that you can still shoot without it. Plenty of longbows and traditional recurves don't use 'em for example. But if properly tuned it will make you more accurate."

Source: Reddit Archery

What is a magnetic plunger button arrow rest?

Magnetic Arrow Rest Cushion Plunger Pressure Button

"These are a little bit less popular than the arrow rests I've listed above, but they're basically the same—they have a hole/an area for a plunger, and an arm that supplies an area for the arrow to sit on—but the shelf that holds your arrow is basically just a wire.

The Cartel Doosung X-Pert Magnetic Arrow Rest is one example. I prefer to use the little plastic options, and I've always enjoyed great accuracy with those, but these are an option if you'd like something more permanent (they're made out of metal, so the idea is that you don't have to replace them as often as you'd have to replace that plastic rests).

Magnetic rests are a little bit advanced, though, so if you're just starting out, a plastic rest will probably do you just fine."

Source: completeguidetoarchery.com

How to setup an archery plunger?

"As with most things archery, the question depends on a few things specific to your set up. The plunger was developed by Vic Berger as a fine tuning mechanism. How do your arrows fly? If the arrows are too weak in spine, or too stiff, a plunger adjustment is not appropriate.

You're always better off finding a good arrow/limb poundage combination and making the fine adjustment with the plunger. In the case of a newer shooter, 1) find the proper center shot 2) set the plunger to a medium stiffness 3) practice until fine tuning becomes important."

Source: archerytalk.com

Related Video: Tip of the Day Plunger string alignment

How to adjust an arrow plunger button?

"Now the bit of equipment everybody fiddles with the most: the pressure button!

Pressure buttons provide tunability and adjustability to your set up. Having a reliable one really is crucial. I’m only going to talk about three here and you’ll see why. The cheapest option I would ever recommend going with for a pressure button is the Shibuya DX.

It is a really solid, reliable and accurate button. It has a gold tip to reduce wear, a selection of springs and a replacement with it. It comes with allen keys to lock it down but doesn’t have click adjustment.

The Spigarelli Micro-Click button is at the lower end of the price scale for buttons with click adjustment. This you adjust and tune in quantifiable amounts, and you can swap between arrows  before returning accurately to the same point. I can definitely recommend this.

The top end and international staple is the Beiter button. Yes, the price point is very much higher than the other two but the quality you receive is worth the investment. These things last decades! The micro adjustment clicks are very accurate, and it comes with three springs, spare tips and a neat storage box.

For the button I seriously recommend spending at least the £25-30 ($30 US)  needed for the Shibuya button – the most basic buttons will set you back £10-15 ($20 US) , and in my opinion the extra cash here is worth it.

In all seriousness buttons can break, move, come loose and have to withstand a lot of shock and vibrations from your shot, so I recommend spending that bit more and getting one you can rely on. Click adjustment is a brilliant feature but buttons with it do cost a bit more – and the Beiter is the best you can buy but they do come with the associated price tag."

Source: bow-international.com

Related Video: Archery | Plungers - What's the Difference?

I'll add more archery plunger related questions as they arise.


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