There are a lot of good 30 caliber cartridges, it all depends on what ya wanna do with 'em,
These days I tend to lean towards accuracy combined with velocity using high BC heavy bullets... currently the 300 Norma Magnum is the best of them all with those factors combined... to make it a bit more barrel friendly I increased the neck length to .375" and bumped the shoulder up to 35 degrees.. basically a long necked version with a bit more powder capacity (105 gr. water)..theoretically the throat should last longer than with the original... leaving at 3250 fps with the Berger 215 gr bullet is most impressive for 1k target shooting and rock hunting on the mountain sides !!, for big game hunting the 200 gr Accubond or the 200 gr Barnes LRX at 3300 fps for anything that walks from 1 yard out to 1k...
I named it the 7.62 PRO (Precision Rifled Ordnance) it is the first cartridge in the PRO series of wildcats frankensteined off the 338 Norma Mag case, I own the reamers made for me by PTG in 6.5mm, 30 and 375 and the 338 and 416 PRO are currently under production by PTG...
