You may not consider it a "Hard", but imo, Sniper is my choice, hands down!! I've played with Triangle, Moori Q, Kamui, and various others in the pursuit of a good playable hard tip. The Sniper I have on my Balabushka and the other on the DP are by far the best I've played. They hold chalk, control very well, and even though I break at around 22 mph, I've never had one mushroom in the least. I had 4 Moori tips blow out the sides, not mushroom, actually lose pcs from the side when hitting a med/firm shot. Not even breaking. I like the controllablilty of Moori's, but will never use one again. There are tons of good hard tips out there...just keep trying until you find one that suits your stroke.
Dave