Any DE Razor can be aggressive or non-aggressive. The R41 is an efficient /aggressive razor, but so is the Fatip grande,and the Parker Variant/mingshi 2000s etc..But, treated with respect like any other DE razor they will reward you with sublime shaves .My humble advice is i find that 90% of traditional wet shaving is all about good preparation, learning your technique, having a good solid razor, and a blade that is suited to your skin type.Every time i shave i don't go for BBS shaves i go for irritation-free enjoyable ones, however from time to time i do get what i consider a BBS shave. Regards.B
When I first started shaving I used to get irritation but after 8 months or so all my shaves are irritation free and regardless of the razor, I've had 7 passes with a mild razor or 4 with the most aggressive razor I own, the R41 and zero irritation ( why so many passees? Well, I don't do that with every shave but occasionally when I'm enjoying the shave so much that I have more passes than my usual 3 passes )
Also, I used to prepare the skin with hot towels, pre shaves, etc but I can't notice any benefits now so other than washing my face before the shave and some bloomed water when possible, I get a good shave.
Technique, good soap/lather and finding the right razor blade combination for your face are the only rules that I follow.
R41, one of my favourite razors, I could do a single pass with the R41 and go to work everyday.... but where is the fun in that?
Edit: re-read my post after a few days and I would add that for everyday shaving all the preparation I need is wash my face and bloom water if possible but for 2 or more days growth then more preparation is needed.
Surely the most aggressive razor would be the razor that was designed without a safety bar - the Barbe Bleue, or the one that took two DE blades - the Razolution. There is now the Saiver Profimed 2.0 razor.
What I did....adjust to 6,then thumb on head and two fingers on base...lift base to relieve tension on spring as if to disassemble,you can see a little lug that stops the adjuster ring turning past max.Taking tension off will allow to turn adjuster past 6 to the 0 setting,release tension on head and it will adjust further to the "12". Do it again to get to 18 and so on.I took it out to 30 for fun but gets close to coming apart after that.