Have to agree with Steve, as I too have seen a couple cases where a nice buck struck directly in the neck with a brand new regular jawed BMI 110, still showed signs of struggle (dry sets). I have never had this happen with the magnum styles. Twice is twice too many in my book, and for an additional $3-4 for a dozen, I dont think the savings of buying a regular jaw justifies an acceptance of a non instant death for the Mink. Regular jaws work fine for bottom edges and rat dens/runs, but is not a good choice for a dry set. A 55, unless talking about the old Montgomerys, are magnum jaws.