Rifle is a Tikka T3X UPR chambered in 6.5CM. I just noticed a crack in the stock behind the bolt and have sent in a warranty claim. I have only put a couple hundred rounds through this rifle. Mix of factory 140/147 ELD-Ms and I also did some ladder testing of 147 ELMs over H4350 the other weekend. I don't know at what point the crack surfaced but I don't believe this is an overpressure issue. I didn't see any flattened primers, bolt hang, or anything like that. Curious on your thoughts of if this could be an overpressure and whether or not it is safe to shoot in the meantime. I was planning on going to the CIHPRS new shooter class coming up but if it's a safety issue, I will either need to pass or look for a replacement stock.