Valve Spring Pressure Loss After Break-In

I have my cam on order, and I have my recommended spring specs (145-150lbs & 350-360lbs). I have my springs chosen (“ISKY” 6105-SP) and now I am trying to dial in my installed height (on paper, as I will check my actual lifts after the cam install).

I was told by the cam company that the new valve springs may lose apx 10% of its pressure during the break-in procedure (I will be removing the inner springs). If so, do I just add 10% onto my recommended seat/nose pressures and match up the installed height? If so, my new pressure ranges are 159-165lbs & 385-396lbs before loss.

The three previous cams that I installed in this block, I just aimed for the recommended spring pressures and never considered the 10% loss detail. This time, I want to make sure before I start.

Thanks

Break it in and then verify the spring load. Shim accordingly.