What are you trying to cure? Is the gun slapping your cheek? How much pitch change is in the spacer? Probably best to have a good stockfitter make a recommendation. I recently purchased a new gun and it slapped my cheek. The stockfitter changed the pitch by 1/8th of an inch, and the problem disappeared...sometimes less is more. I used Rod Stumbo of Rod's Custom Gunstocks...excellent work.