While on the subject of hammers: I wouldn't use a wooden hammer to hit a small letter punch, or any hard metal object. You'll just damage your hammer. Rubber hammers too.

While going to extremes with hammers to secure a seed phrase: I've seen good things about titanium hammers (on Youtube, I never tried it). It's supposed to be lighter, vibrates less, and transfers more of it's energy. But I assume you're not going to do this for 8 hours per day, so it really doesn't matter much.