Tim, I've been shooting Delta 3200 at 1000 and developing in TMAX developer 1:4 70 degrees for 7 minutes. I like it better than TMZ because the tones I get are good, very good highlight detail and seperation. The grain may be alittle smaller than TMZ it's hard to say. The first roll I shot was at 1600 and the shadow detail was less than I like, so 1000 is now my standard. A very good film! By the way, I use a condenser enlarger. Good luck!!(posted 9082 days ago)Bob