I guess they offer a big helping hand to "ultraspeeds" Weatherby and Co. calibers, 8x68S comes to mind as well etc. Full potential of hydros lays in velocity - the faster you push them the better they get - so that is the way they should steer them - speaking of "regular" heavy&slow minded penetrating calibers. Therefore make them light (short) and push them as fast as it gets.

P.S. As I noticed Woodleigh is already offering them in 232 gr. for 9,3 mm - BINGO - instead of investing in penetration (that there is aplenty already) one invests in velocity with flatter trajectory and bigger wound channel...That is for regular use on all game but Eles. For Ele headshots regular weights&speeds are still the way to go JMHO.