I have never reached the adverised velocity with DT. Can be good ammo though. The last one I checked was a 40 S&W load. 135gr. Nosler, which was advertised to be 1,375fps out of a 4" gun, but I could not get above 1,325fps. It could be my gun, but the 135gr Corbon advertises 1,325fps and that is pretty much what I get out of the same gun.
I have not chronographed the 45 230gr. in a 5" barrel, but I find it hard to believe they reach 1,025fps without being at least +P and they are not rated so.