It’s possible for the spring in the scale to wear out and give you an inaccurate measurement. If your scale is starting to give inconsistent measurements, then you probably need a replacement spring. A professional at a bow shop should be able to replace it for you.

Use the hand that you usually draw your bow with. If you’re right-handed, then hold it in your right hand. Make sure the numbers on the scale face you, otherwise your hand might block the indicator. [4] X Research source

Test to make sure the scale is attached a few times before you draw it back fully. Pull back a bit to make sure the hook doesn’t come loose.

Don’t point the bow at any people or things that could break. If you let go of the scale, you could shoot it like an arrow. Some professionals like to nock an arrow while they’re measuring the poundage to mimic their draw length when they’re actually shooting. However, if you’re not experienced using a bow scale, don’t do this. If you release the string accidentally, you could shoot the arrow.

Do not let go of the scale at any point. If you feel like you’re losing your grip, then release the tension slowly.

Slide the indicator back to zero so you’re ready for the next measurement. You might want to check 2 or 3 times to confirm your first measurement.

You can also use a different unit of measure if you’d like. Always check the instructions on the scale you’re using for the proper procedure. Some scales have on switches and others might simply activate when you press a button.

Many bows have a draw weight of over 60 lb (27 kg), so you need a mount that can hold at least that much weight. Do not use a nail or screw in the ceiling to secure the scale. These aren’t strong enough and could pop out.

An electric scale automatically measures the max draw weight on the string, so even if you pull it too far, this won’t make a difference.

You can confirm your measurement by measuring a few more times. Remember to hit “tare” to set it back to zero. Regardless of the bow’s poundage, if you can’t pull it back to your full draw comfortably, then it’s too heavy and needs adjustment. [17] X Research source