13.9 AR bullet velocity?

[Chasingpro]

I don’t own a chrono and really don’t want to spend the money on one. Does anyone have some rough estimates of velocity for m193 in a 13.9 inch barrel? Just trying to determine a good zero distance for the new upper.

 

[TonyTheTiger]

Never chrono'd M193 specifically, but some factory 55gr stuff is 2800-2900fps from my 13.7". Generic MK262 clone stuff is 2450-2500fps.

 

[Vivacious Stallion]

I don’t own a chrono and really don’t want to spend the money on one. Does anyone have some rough estimates of velocity for m193 in a 13.9 inch barrel? Just trying to determine a good zero distance for the new upper.

I just use a 50yd zero for my 13.7" and 10.3". They're more or less dead on for impact at 200yds with m193.

 

[bfoosh006]

While this link doesn't have a 13.9".... it does have helpful info on 10.5", 11.5", 12.5" and 14.5"

https://www.ar15.com/forums/ar-15/S...-10-5-11-5-12-5-and-14-5-ALL-DONE-/16-714088/

 

[zekers7]

hornady 75gr frontier - 2643 measured with a magnetospeed out of my roscoe bloodline 13.7"