Creating feedback when using IRs (Crust/Hardcore/Screamo)

Yup, the DI's would contain the fed-back signal produced when you're recording with a real amp.

If the feedback isn't as pronounced as you'd like when re-amping, you can add some compression (and maybe some harmonic excitement or verb) to the DI when it starts to feed back. I've had good luck doing that.

Great. And good tip ;) Thank you Jordon