Sciencemadness Discussion Board - Air Rifle Pellets

Air Rifle Pellets

Chemgineer - 10-6-2025 at 15:31

Out of interest, what are air rifle pellets usually made from these days? I might try and recycle some.

Sulaiman - 11-6-2025 at 01:08

I believe that most pellets are still soft (pure) lead
some have a little antimony for hardness.
If the packaging does not indicate "lead free" then they are probably lead.

melt a batch into a solid mass and measure its density
not many materials are as dense as lead.
Anything denser than lead is also more valuable than lead

RU_KLO - 11-6-2025 at 10:09

Dissolve 1 or 2 pellets in diluted HNO3.

Any residue, probably antimony. (if everything dissolves, then add some water to dilute - as antimony oxides are insoluble in water (hydrolysis), but soluble in mineral acids.
Lead nitrate is soluble in water.

Then add 1-3M HCl, any white precipitation PbCl2. To confirm boil the solution, PbCl2 will dissolve in boiling water. (of course depending on starting quantity.
PbCl2 Solubility in water. 0.673 g/100 ml (0 °C) 0.99 g/100 ml (20 °C) 3.34 g/100 ml (100 °C)

Fery - 11-6-2025 at 11:23

Some brands and vendors replace Pb with Bi+Sn alloy to reduce environmental and health impacts.

Sulaiman - 11-6-2025 at 20:22

Quote: Originally posted by RU_KLO

Dissolve 1 or 2 pellets in diluted HNO3.
........
Lead nitrate is soluble in water.

it is also able to pass through your skin and poison you, so take care.
(the layer of fat beneath your skin is fairly resistant to lead nitrate, but the lead will be in your body)

Precipitates - 12-6-2025 at 01:06

Potassium iodide can also be added to a lead nitrate solution to obtain a beautiful golden precipitate (i.e., the "Golden Rain" experiment).

As per the safety advice above - soluble lead salts need to be handled with care, and disposed of appropriately.

bnull - 12-6-2025 at 02:56

You don't need to dissolve the pellets to test for lead. Dissolve a few crystals of sodium or potassium iodide in a drop of water and add some acid (I used oxalic acid, you can use sulfuric or hydrochloric acid). Put the solution in contact with the pellet. If it contains lead, it gets a nice yellow coat of lead iodide. The advantage here is that, despite the low solubility of lead oxalate (or sulfate or chloride, in your case), there will be more than enough lead ions in solution for the test but not enough to pose a risk greater than handling the pellets with your bare hands.

Precipitates - 12-6-2025 at 07:05

Or just buy a lead test swab - if we're going down the ease of testing for lead route

davidfetter - 12-6-2025 at 07:26

Quote: Originally posted by Sulaiman

I believe that most pellets are still soft (pure) lead
some have a little antimony for hardness.
If the packaging does not indicate "lead free" then they are probably lead.

melt a batch into a solid mass and measure its density
not many materials are as dense as lead.
Anything denser than lead is also more valuable than lead

You can get a pretty good idea of the density with a scale and a large beaker. Here's how:

1. Weigh (or tare) the beaker.
2. Re-weigh it, this time filled with distilled water instead of air.
3. Empty it, but don't work too hard at this, into a separate container.
4. Weigh separately a big bunch of the pellets, enough to fill some large fraction of the beaker.
5. Carefully pour the weighed pellets into the beaker in order to avoid breaking the beaker.
6. Re-fill the beaker to the same level with water, ensuring that the pellets are all submerged. You may need to jiggle it/apply ultrasonic/etc. to ensure it's free of air bubbles.
7. Re-weigh the beaker. You now have all the information you need for this measurement.
8. Do the obvious arithmetic to find the density of the pellets.

You're relying on the fact that water has a convenient density, 1 kg/l, so you can figure out the volume of the beaker which does not contain pellets, subtract that volume from the volume of the beaker, and divide the weight of the pellets by that number.

Radiums Lab - 12-6-2025 at 07:38

Nurd Rage has a good vedio about lead testing using potassium rhodizonate (K2C6O6) including the synthesis of it go check it out.

Please note that it only gives positive for lead but not antimony or any other element(correct me if I'm wrong).

[Edited on 12-6-2025 by Radiums Lab]