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I've not seen PTFE balls mentioned as practice ammo so here goes.
When choosing indoor ammo I think the most important consideration is finding something closely matching your outdoor ammo. This means technique developed indoors (like a good pouch release) should be transferable outdoors.
PTFE balls are available in a range of diameters - all the sizes of steel we shoot - meaning you can match your indoors and outdoors ammo exactly. PTFE is a particularly dense plastic (2.2 g/cm3). This means for a given size it has greater weight, not too light, unlike some other plastic practice ammo.
Downsides? Cost. About $2 each. Now, matching bands to PTFE ammo. An example:
A 9.5mm (3/8) PTFE ball weighs 0.99g
A 1/4" steel ball weighs 1.05g
Therefore band suggestions for shooting 1/4" steel apply the same.
To calculate the weight of a PTFE ball you can use these tools:
Volume of a sphere Calculator
https://keisan.casio.com/exec/system/1223372883
Volume and Density to Mass Calculator
https://www.sensorsone.com/volume-and-density-to-mass-calculator/
When choosing indoor ammo I think the most important consideration is finding something closely matching your outdoor ammo. This means technique developed indoors (like a good pouch release) should be transferable outdoors.
PTFE balls are available in a range of diameters - all the sizes of steel we shoot - meaning you can match your indoors and outdoors ammo exactly. PTFE is a particularly dense plastic (2.2 g/cm3). This means for a given size it has greater weight, not too light, unlike some other plastic practice ammo.
Downsides? Cost. About $2 each. Now, matching bands to PTFE ammo. An example:
A 9.5mm (3/8) PTFE ball weighs 0.99g
A 1/4" steel ball weighs 1.05g
Therefore band suggestions for shooting 1/4" steel apply the same.
To calculate the weight of a PTFE ball you can use these tools:
Volume of a sphere Calculator
https://keisan.casio.com/exec/system/1223372883
Volume and Density to Mass Calculator
https://www.sensorsone.com/volume-and-density-to-mass-calculator/
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