Midway lists them as "Coming soon - Estimated 8/7/2021"
Midway should be among the first to get some in,
Then look for user reviews on the Midway product page for feedback about them.
The Hornady Bore Driver Muzzleloading Bullets 50 Caliber 290 Grain FTX Pack of 20 is a fast and easy to load bullet that delivers the ultimate in...
www.midwayusa.com
There's an outfit named named Target Sports USA that may sell them for less than Midway if they come in.
May want to keep them in mind to compare the price,
Hornady 50 Cal 499. Ammo 290 Grain Bore Driver FTX at Target Sports USA with free shipping available. Enjoy deals on 50 cal BMG ammo
www.targetsportsusa.com