IME and that of Bill Hober, who owns Swift, they need to jump for maximum accuracy. Bill stopped by to visit after his last grizzly hunt up here and we got to talking about Scirrocos since that's what he used on that bear. He said best accuracy will usually come when they are seated down to where the ogive is just barely above the case mouth. I have only used them in the 270 win and visited with Bill and his son Tony so ymmv.