220s tend to be a bridge too far.
I have done a LOT of shooting, development, etc with both heavy 200s and 220s loads and settled on a hardcast 200.
A lot of people have reported issues with the 220 grain projectiles. I recommend a 20# spring, both for recoil control and to keep the gun in battery a bit longer, as well as keep prevent it from beating itself up during the cycle of operations.