Yes, it is. IIRC Bill Wilson has some in stock, though.
Who's Bill Wilson?
The .300 is designed to do exactly that, the only thing that really needs to be changed is the barrel. These other gentlemen are correct that it is really hard to find ammo right now for it tho. Much of the ammo I am finding is over 1.50 a round but you can reload for less than 1/4 of that price.
Dennis Mitchell's neighbor