The cost of ammunition, reloading parts, and even firearms manufactured outside of the United States will increase, just like everything else. Nobody knows how much or for how long.
Luckily, I reload all of my guns except for the 22lr, and I've been purchasing and stockpiling primers, powder, and bullets for a while.
I estimate that I have enough parts to last for several years plus roughly 8,000 rounds of 22-inch ammunition, taking into account how frequently I fire.
I also have molds for every caliber I shoot, with the exception of 22lr, 500 pounds of casting lead, and enough coating powder to cover every bullet I would cast as a backup.