Interesting this topic deals with 2 pieces of equipment that I really wanted to work for me...the Leica 2200 I ordered new and the DT system (of which I owned 4 chassis, every gen, 8 barrels and 7 different bolts (repeatedly called DT regarding bolt issues, broken firing pins, failure to adequately punch primers and weather related functionality).
The 2200 I had did have great glass, but it could not match my Leica 1600 - not even close. It was pathetic, actually. I thought it would be great for hunting, since I already owned a fabulous PLRF15 and the new 1600, Held steady on my RRS tripod the 2200 could not range deer in my backyard @ 800 yards. I notified the dealer within an hour of receiving/testing it and had to return it as a "used" item and took a hit $$ on the Leica.
Subsequently I sold the 1600 as well, bought the Sig 2400 and ran it sided by side to my PLRF15 for a few months. The Sig has been outstanding out to 2K on everything. It easily ranged steel @ 1960 yards (PLRF15 showed 1957) and then again @ 1200 yards (PLRF showed 1199). The sig ranges deer/antelope/elk @ 1200 plus easily. I sold the PLRF15 and bought the new Swaro EL Range for hunting and could not be happier with the Sig and the Swaro.
On the DT, I had repeated bolt failures. Accurate as all get out, nice balance point - but unreliable for me. Oh, baby I tried, poured lots of $$ into different chassis/bolt/barrel combos. In 2013 I had a nice bull elk in my crosshairs and heard the awful "click" yet again, failure to punch the primer sufficiently. I hunt in the Rockies, so I know to run everything dry because of our extreme conditions, but this was a perfectly dry opening morning 40 degrees, I re-cocked the bolt on the DT and dropped the 2013 bull that now hangs on my wall.
I drew a great, rare late bull tag in 2015 and took the DT into the backcountry. Extreme weather, passed on 2 nice 330-340 bulls. Each day I had to completely disassemble the DT and wipe out the moisture from the snow blowing into that system. First light it would function fine after the being moisture free and in the scabbard of my horse of course. But I would be out in blizzards on foot, looking at bulls throughout the day. By evening the moisture from the daytime would freeze the trigger bullpup configuration. I simply could not keep it operational.
Unfortunately, on my last evening I had a beautiful 360 bull standing @ 200 yards and the system was frozen again. I simply could not physically pull the trigger. Being in cover and the bull in the open right in front of me, I put my jacket up against timber, disassembled the rifle in -10 degree weather, (moisture build up on the transfer bars frozen) put it back together and still could not make the thing go bang. I simply watched the big old bull walk off, unaware of my presence. Great hunt, but that one did it for me and I sold the all of my DT stuff and just use my AXMC or Blaser R8. They both function 100% regardless of conditions, period.
Absolutely done with Leica and DT. Still hunting for a 360 class bull.