Why does everyone chop their barrels to an even number length?

[AK4570]

I bobbed a 300WM to 21 3/8 while living in AK (and dropped it into a Bansner)... Does that count?

 

[Team4LongGun]

21" 7PRC I determine length based on ballistics and how it will carry with suppressor/folding stock/on pack hiking in, etc.

I think the most vocal guys make it seem more prevalent than it is. Much like many rifle parts.

 

[C Bow]

For me I will never own another rifle with a barrel over 18 inches as soon as I buy one it goes to Kampfield to get cut

 

[Ohiohuntr]

I told my gunsmith to chop mine at 18”, picked it up today and it was 19” lol must use the same tape my dad uses to measure fish

 

[h2so4]

I’ve got a 17” .223. Going against the grain

 

[Judd]

it’s the same reason radio stations always end in an odd number. I think it’s something to do with the molecular structure of the sine wave

 

[Macintosh]

Dont tell anyone their made-anywhere-other-than-USA barrel is actually 60cm (23.6”) or 55cm (21.6cm).