If you have immediate access to the wood 15x8 prop I say try it.
Re-tune so it reaches max rpm and then back the needle out just a bit to make the mixture rich and fly it. If it "sounds' like it's stumbling or not reaching full rpm at high throttle you may be to lean or too rich on the high speed needle. Bring it in and feel the engine and if it's really hot you are too lean back out the HS needle a bit ; if it's not really hot then it may be too rich so turn in the HS needle a click. May need to do this a few times until you get it right. Also the low speed needle may need to be adjusted as well depending if it stumbles from idle to full throttle(too lean) or if it bogs down and throws out a lot of fuel/smoke(too rich) The low speed needle will affect the high speed needle setting.
When you get it tuned and if it still doesn't fly well then get the 15x6 APC and repeat the process.