Delta 3200 has long been considered an ISO 800 film that is designed to be pushed. Expose it at 800 and you'll get nice dense negatives with small gain and normal contrast. Expose it at 3200 and you'll have to push Fresno l development, with lighter density, larger gain, higher contrast.
You'll have better results using a push developer (IIRC ascorbic acid developers are recommended). Some people enjoy using Diafine with it, shot at around 2000. But Diafine divides opinions.
The Massive Dev Chart is a resource I always check before developing. This article has examples of Delta 3200 developed in various solutions (both positive and negative results).
