No, I shaved as I normally would. I shave gently and make certain that I'm not using undue pressure. I bought them because they were inexpensive and I thought they would serve well in my Parker 96r.The Dorco Prime Platinum STP-301 blades are actually pretty good (and very inexpensive). The ST-300s are a bit on the dull side so maybe you felt you had to apply more pressure to get a close shave with them.
* buuuzzzz* Wrong answer! (Thanks for playing)! I paid the price.