I've been working my way through a sampler pack of DE blades that I bought with my first SR (1958 Gillette Super Speed). Based on feedback from members I ranked the blades from least aggressive to most aggressive. I started out with a Derby Extra, moved to a Wilkinson Sword, and today tried an Astra Superior Platinum. Doing everything exactly as I had done previously, today I experienced some "grabbing". Is this to be expected with sharper (more aggressive) blades?