Aguila 10mm?

[Intercooler]

     Very odd! What would the stated charge push those 180's to?

http://www.armslist.com/posts/2316961/reno-nevada-ammo-for-sale--10mm-auto-ammo

[4949shooter]

Don't know but it looks old enough to have been manufactured for the Bren Ten.

[The_Shadow]

The Aguila boxes are reloaded ammo...400 rounds of reloads labeled 7.3 gr. WSF1, 180 gr. copper wash. $15 per 50

Here is Hodgdon's data for real 180 JHP copper jacketed
180 GR. SIE JHC WSF .400" 1.260" 5.7gr @ 950 - 25,000 PSI , 7.1gr @ 1150 - 35,600 PSI

[Intercooler]

  Given that information it would possibly be 1175 FPS?

[The_Shadow]

It is possible!  How well the person did with loading them is the key!  WSF (Win Super Field) does measure fairly well and consistently.