What is the reason U.S. Mfg's bypass Steel?

[Intercooler]

   Seems they are offering a metric line but in brass.  This doesn't compete well with the foreign steel cased. I always thought 10mm in steel at a cheap price might be a good option. Will steel handle higher pressures better?

[sqlbullet]

I think there are three factors at play here.  First, US mfg's want to maintain or build a reputation of quality, well-built ammo.  Brass helps reinforce that, where steel screams cheap to consumers.

Second, steel ammo is less reliable in general than brass ammo. 

Third, the US market is heavily populated with reloaders compared to other markets. This matters to some consumers (most of us here I would guess), and it matters to gun stores with ranges.  They make a good extra margin selling once fired brass to re-man companies.