just a guess your adaptors might be 5/16 and the snuffer ferrule is 11/32.
honestly though if they spin true they will still work fine, the insert on the end of the shaft should still seat up inside the ferrule of the snuffer against the insert,,,,,, when you fit everything together using hot melt and the arrow is still a little hot just spin the arrow with broadhead on a hard surface and if it wobbles hold the shaft tight and turn the broadhead a tad on the insert and repeat till you find the sweet spot....... I have a one piece broadhead a used G5 but anything will do to test my arrows first to be sure the insert is perfectly straight before broadhead spin testing.