Hercules .357
For the Hercules .357 you will need this adapter.
https://donnyfl.com/products/hatsan-qe-big-bore-357-m18x1-adapter-a30?_pos=3&_sid=f51509eb6&_ss=r

I recommend the Ronin .357 M18x1.
https://donnyfl.com/collections/ldc/products/2-x-6-5-inch-ronin?variant=13286078251051


Hercules .457

For the Hercules .457 you will need this adapter.
https://donnyfl.com/products/hatsan-qe-big-bore-357-m18x1-adapter-a30?_pos=3&_sid=f51509eb6&_ss=r


I recommend the Emperor .45/.50 M18x1 #S5B

https://donnyfl.com/collections/ldc/products/2-x-10-5-inches-emperor-v3?variant=14050945105963