For those who own .375 caliber rifles and reload, there are bullets available in the 250 grain class and heavier for most manufacturers. Having said that, Hornady has had the ever popular 220 grain flat nose for deer hunters but is manufacture has been temporarily suspended now in its third year of suspension I believe.
The 225 grain spitzer is also temp suspended.
I suggest you do as I did and write Hornady a note that you are looking for this bullet. http://www.hornady.com/thanks-for-contacting-us
The Sierra 200 grain .375 FN is available on back order from Sierra.
I have developed reduced power reloads for both the 200 grain and the .220 grain in my rifle and you can too if you do some research on .375 Cartridges and use a Chronograph.
The 235 grain Hot Core is also suspended from Speer. Don’t know the reason but was able to stock up a few years ago.
I will share the response from Hornady on the 220 grain in hopes they will make them available again.