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10gr with the weights in should be sweet
9gr is prob 900-950

Whats the 220gr speed?

Not just a pretty face :)

If you get to your speed for subs and still not functioning 100%, yes can open up the port a touch
Should be able to get lockback

Try a std spring and buffer - if...

Your 125 load is pretty anaemic
150gr will uses ~17gr H110
110 loads are up at 20gr

0.105 is on the small size
0.110-0.120 is preferable, but some 2207 should sort you out

Yip all too slow
10gr of 07 should have you going pretty good.
As always (with subs) start HIGH and work DOWN - start 11ish

Also whats you port size and position?

Yip.
Let me know what you have and I'll check my data

I doubt if you will get any joy with the 220s using H110, its simply too fast - need to slow down to 2207/H4198 - 10gr ish