I have always sniffed k and never had any trouble to k hole. I usually just start with a small line and work my way up. I am definitely a binge user of ketamine, by the end of a binge I am snorting half foot long lines and coughing out clouds of powder. K holing is definitely the goal to aim for IMO. Crushing ketamine is super super super important if you don't want to seriously fuck up your nose. Ketamine was the first drug I regularly sniffed and the first time I got it I didn't realize the importance of crushing it. It doesn't really hurt to sniff it when it is not crushed, but trust me it doesn't take long for it to royally fuck up your nose and if it does it takes ages to heal.