A question for the learned assembly.

I am not a newby shaver, having been wet shaving over 50years. With the exception of a very short time post college where I dabbled with an electric. So my question is sincere:
I have always felt that razor burn was the result of technique rather then equipment. I recently purchased a Rockwell 6C, having sold my 2C in order to get a larger choice of adjustment. I am experiencing razor burn with the 6C, first time in my shaving life.  I've tried Rockwell blades, Astra Superior Platinum and 7 o'clock yellow. Ive tried the 4 plate and 2 plate. All while getting burned.
Can someone shed some light and perhaps some suggestions.

If it isn't technique (which it could be when going to razor that changes the angle or proper amount of pressure needed ) could it possibly brush burn from over scrubbing or a reaction to a new software product ?

Assuming it isn't a technique issue one thing could be the razor is just too aggressive for your face. If that is case using it enough your skin will adjust to the razor over time if it is something you can tolerate in the short term. If it is technique try less pressure and shallower angle aka cap almost parallel to the face.

Another thing to try independent of that is shave with cold water. For razor burn what I've done for years now is when I am done shaving I make sure my face is wet and and put a little apple cider vinegar in my palms, rub my hands together then touch first then rub it into the face and let air dry. You apply any aftershave or balms once it is dry. Just make sure your face is wet or cut it with some water first before you apply. It is not only good for the skin but deals with any post shave burn like it would sunburn. It will sting going on but give it about a half hour and your face will feel like you never shaved it except for it missing the hair.

My post shave routine which nips shave burn in the bud is the following, I apply alcohol free witch hazel then the apple cide vinegar while still wet and let air dry. For a balm which is not necessary but really helps with firming up the skin afterward is I use Pure Aloe Vera Gel. Same deal apply and let air dry.

I use a Rockwell 6s all the time and don’t have razor burn issues. Maybe you’re doing too many passes or applying too much pressure. Which plate are you using?  I like either 3 or 4 as I find 5 and 6 a bit aggressive for me. I also find I have better shaves with sharper blades. Feather is my favourite because I know it will remove the stubble. I’ll use some other blades including the ones you mentioned occasionally,however I often find those blades don’t take down the stubble very well. I’ll do a pass and can tell from the feel and the sound that the blade is engaging the whiskers but the stubble remains unphased by the blade. Of course I then proceed to go over it again sometimes several times reapplying lather of course but with little effect other than irritation. So I figure stick with the Feather. It removes the stubble with far fewer passes resulting in less irritation. Also cheaper in the long run as I’ll get easily double the shaves out of a Feather as I get from those other, lower priced blades.  My two bits worth.

What other de razor you've used over the past 50 years? 
It's probably not pertinent but curiosity is getting the best of me.
  What about shaving soaps, which ones do you use?

I am not a newby shaver, having been wet shaving over 50years. With the exception of a very short time post college where I dabbled with an electric. So my question is sincere:
I have always felt that razor burn was the result of technique rather then equipment. I recently purchased a Rockwell 6C, having sold my 2C in order to get a larger choice of adjustment. I am experiencing razor burn with the 6C, first time in my shaving life.  I've tried Rockwell blades, Astra Superior Platinum and 7 o'clock yellow. Ive tried the 4 plate and 2 plate. All while getting burned.
Can someone shed some light and perhaps some suggestions.

The 2c and the 6c are identical with the 1/3 plate. Same geometry, same weight, same exact razor. Thus, I'd balk at calling out too much pressure or poor angle right away. You know this razor well (at least the framework thereof).

If you use the 3 plate previously, I'd have difficulty seeing how you are getting irritation on the 2 unless you are using a lot of pressure to compensate and chasing the BBS. The 4 plate could absolutely be just too close for the way you are used to using this razor.

You could also try the 1/3 on your 6c to see how that goes. It should rid you of the issues as you've used it before (a lot?). If not, we'll bow we're going down a different rabbit hole (blades? Soap? Maybe even something off about the 6c?)

This might be easier if it were the 6s. That has a different, more coarse finish AND more weight. The 6c and 2c are, again, the same razor.

Sent from my Pixel 4a using Tapatalk

I have the 6C and it is always on the 4 plate. I remember getting razor burn often when using it, however I was only a few months into DE shaving so technique could have very well been my issue. I decided to use the 6C for a month straight to get to know it better, and after two weeks I noticed that I was no longer getting razor burn. I don’t know if my technique got better, my skin got used to it, or the blades I decided to use. My favorite blades are the 7 o’clock Blacks and Voskhods. Hope this helps a little bit.

Thanks for all of the information. The steps I'll try going forward will be (in no order) Check the pressure being applied...Check angle of attack and change to flatter angle. Marko you bring an up interesting idea. Because the 6C with the blades I've used isn't very efficient I may be over compensating. I'll try a sharper blade...7 o'clock black or PolSilver or Niacet.

Keith: You asked so in no particular order: mostly Gillette's Red Tip, Black Tip, Trac II, TechMatic, Milord, Black Handle Long & Short Schick Krona, Injector-- President*, Slim* , Viking Chieftain*, Super Speed, Parker 76* EJ DB89* and Rockwell 6 (*currently owned) AND I'M NOT DONE YET

https://sharpologist.com/get-better-shav...em-solver/

Bflotom2 that's good an assorted amount of razors. 
   Keep us up on things you might notice as time/shaves pass. 
There's some good ideas around here, and almost guaranteed someone had has similar situations.