I always break the bone with the back of the blade, I wasn’t even attempting to break it at that time, my blade was stuck I applied quite a bit of pressure to cut whatever my blade was caught up in and I ended up hitting a bone, the chip wasn’t deep but it was wide, I tried to finish skinning with my pm2 and ended up being a nightmare, the knife was a custom from a guy in Spain made out of 4v at 63hrc if I remember correctly, I can’t say for sure but I believe it was at around 34 inclusive. I hope to get better results with 3v and I think I’ll be getting the wood knife in aeb-l even though I’m pretty happy with sleipner at the moment. Thank you for the advice