Which ammo to use for barrel break in, Wolf or Hornady AG?

[FlashHercules]

Finally getting out to the lease this weekend to dial in my 13" Grendel upper, get some chronograph data, zero my scope, etc... but I'm not sure what ammo to use for the break in procedure. I'm thinking the Wolf bimetal projectiles could make it a little easier when cleaning fouling, but wanted to get y'all's opinion first.

Thanks in advance!