4 pellets will be noticed when they're ignited. I do not shoot 4 pellets in mine, rather 3 T7M at 180grs. I use a PAST recoil pad and the muzzle brake certainly helps. However its not as bad as one thinks, unless one is recoil shy.
NOTE: The charges being discussed are ONLY to be used in custom rifles, proofed for those charges. These charges should never be used in production rifles or rifles who's manufacturer doesn't list them as an exceptable charge. Read your owners manual and follow all safety warnings.