I bought a new pair of backpacking boots (Asolo 520 GTX) and put on my black diamond contact crampons on them. I summited Mt. Shasta couple of days back, however, the crampons punctured my boots in a couple of spots (near the toes)
I wonder if anyone else has had this issue or was it just me (and my boots) ? I've used contact crampons before with my hiking boots and didn't have any issues and I've also used step-in crampons with Lowa GTX Mountaineering boots and did not have issues with those either.
Any word of advice ? Should I just buy plastic boots ?
You should learn to walk with crampons on, seriously. I wear crampons with trail running shoes and approach shoes sometimes. Its not the boots fault. Take the boots to a cobbler to see if they can fix them or just Seam Grip them very well to maintain water resistance. Plastic boots are for very cold and/or extended trips/expeditions.