Have a look around, there is bugger all people with fast twist 30cal barrels... sure we love our custom barrels, BUT NOONE IS DOING IT with faster twistss in 30cal!... therefore the bullets have not needed to meet any demand... The same cannot be said for all calibers... in some calibers, faster twists have become more common place and therefore the bullets exist... funny that hey?
Its the chicken or the egg syndrome...
Take .338 for example, the 10 twist is the most common... a 10 twist in .338 is a tighter twist in turns per caliber than a 10 twist in 30cal... same goes for a 9 twist is a tighter twist (in turns per caliber) in 7mm, than a 1:10 30cal barrel.
Why else do you think the bullet makers would have simply forgotton about probably the most popular caliber in the world??? There are reasons...
The solution begins with everyone ordering their next 30cal barrel in a faster twist, else the bulletswill never come... There are already many custom bullet makers that will cater for your faster twist barrel, and make you a bullet with a much higher BC... you just need to ask around to find them.