Just an FYI, if you haven't tried a box of Armscor's 10mm 180gn FMJ ...
I picked up two boxes out of curiosity to see if this was closer to a true 10mm "practice" load than the barely .40-level Privi Partisan (PPU) 180gn fodder.
From Midway (prod # 622929) Armscor's price pt. is $23.99 per box. This compares favorably to PPU's $21.49 per 50-rd box.
However, the difference in performance is significant. While the Armscor 180gn load doesn't have the snap of DT's old 180gn FMJ practice load (@ 1250fps), it's got every bit of the boxflap velocity of 1150fps/529fpe advertised on Midway's Armscor page.
Over the years I've shot a ton of Remington's 180gn FMJ load, which has the same fps/fpe rating and which Midway offers at $32+ per 50-rd box. A few years back I assisted in chronographing some of the Rem 10mm from a G20 and a S&W 1076 and it averaged only slightly below the claimed 1150fps, so I'm confident that with the Armscor ammo you're getting velocity that is substantially the same, if not a bit hotter, and at a better price pt. Velocities can vary from lot to lot, of course, as we know from long experience from the Win 175gn STHP, and your experience could differ. But I was pleasantly surprised - like walking into a hole-in-the-wall dive and getting friendly service and great food. YMMV.
Again, I'm not suggesting that Armscor makes a full-throttle 10mm practice load. It doesn't, and I wasn't expecting one, but making that type of load is what my reloading time is spent doing.
What Armscor, a Philippine-based company, does do is offer the 10mm user an economic "off-the-shelf" choice of better than .40-level velocity. Plus the brass Armscor uses, IMO, is better than PPU's for eventual reloading.
So pick up a box and try some, and if you can chronograph it, post the results back here. If that was already done, sorry, I missed it.
For many years I was hoping that foreign ammo companies would enter the U.S. 10mm market, at least with a mid-range load although really hoping for one in the upper midrange. PPU did get in recently, but their sole offering is really timid.
My money for a long time had been on Fiocchi, as they make spicy loads in other calibers, like .40 & 9mm. Time will tell.
Maybe if CZ ever gets its "experimental" 15+1, all-steel 10mm gun to to the U. S. market, and if EEA starts importing the Turkish-made K2 10mms to follow up on the .45acp model (a CZ-style double stack), we'll see more international 10mm product coming in at competitive prices.
Maybe these old eyes will even see a 10mm load from Norma again ...