Hornady has been loading Swift ammo for years. (55 gr. V-Max bullet.) Saw some just last week at stores here in Amish country. I tried some in my Ruger Mk. II and it wasn’t great; good ol’ 414/760 and 50-55 plastic tips shoot great so far in it. I plan on eventually going to a bit faster-twist barrel to stabilize the 53 V-Max.
HSM also produces loaded ammo for .220 Swift.