Can the puppy go out into the wide world?
If so, chasing about with a ball on hard surfaces like a deserted car park will take the edge off the claws. Obviously getting a puppy used to nail clipping is good but once it is walking on mixed surfaces they should stay short enough.
@DethBeard condolences.
Anyone have any recommendations for how to trim/blunt razor sharp puppy claws?
Human toenail clippers are very fiddly and leave them even sharper.