The counts for the #5 hevi's may seem low , but take into mind that there is only 172 per ounce and that load is nearing 1 full ounce in a 10" at 40 yards -
A #5 Hevi is roughly double the physical weight of a #7 Hevi - if by chance EM can replicate that efficiency an transfer it to the #6 or#7 - 10 gauge loads due for production will be scorchers - could you imagine a #6 and #7 loads that shot 230 and 340 consistently shot after shot
The very best #5 hevi load out there IMO is the Nitro 2.25 load that shell shoots at 1240 fps and is a 170-190 load out of a .685 - a #5 at that speed breaks wings and legs - I've seen it