I've been a 10MM fan since it's introduction. Had a Bren Ten, Colt Delta, Glock, Kimber, Ruger Blackhawk, various S&W semi-autos, S&W 610s,etc.
Were I in the market for a 10MM 1911, it would not be a Delta. It is certainly the original, but I wouldn't buy another 10MM 1911 that did not have a well supported, ramped, barrel. The unramped Colt barrel, with lots of unsupported brass hanging out over the barrel throat, did not fill me with confidence. Fortunately, the 10MM case head is a strong one, and I never had a case head blow. I still had my Delta rebarreled by BarSto with one of their early ramped 10MM barrels. One shooter told me his Delta cracked through the locking lug area of the slide. I wasn't present, so can't testify to it. He said Colt warranted it by replacing the gun, which he said he sold without ever firing a round through it.
I'm not picking on the Delta 10MM, I feel the same way about other high pressure cartridges,e.g., 9MM, 38 Super, 9X23 Win., etc. I realize most people have never experienced anything ugly using unramped barrels with these high pressure cartridges, just as most people who proudly leave their home's widows and doors unlocked have never suffered a burglary or home invasion. I guess I'm just in a cautious minority on these issues