I find Delta 400 very nice, with a much tighter grain than HP5+.(posted 9361 days ago)Rather than pushing Delta 400, you might try Delta 3200, which is really about ISO 800, without any pushing. I develop it in T-Max 1+4 24 degC for 9.5 minutes. I don't claim this is the 'best' development (I haven't tried other developers), but I am very happy with the grain at 10x8.