Walnut can swell up but doesn't change POI if everything is right. As I posted previously, prettiest rifle in my safe is Mrs Blacktailer's Super America Kimber. We got caught in a real downpour chasing some wildebeest and when we got back to camp the PH and I decided we should clean our guns. Tried to take the Kimber out of the stock and there was no way those action screws would budge because the stock had swelled. Decided to wait until we got home to give it a good cleaning and by the time we got home, the screws came out fine. Shot an impala the day after the downpour at over 100 yards and several other animals in the succeeding days and the POI had not changed a bit.
