(forgive me as I am poor at theory…I think I’m talking “16th notes” vs “quarter note triplets” but perhaps am wrong)
I’m working on a riff that’s generally 3nps and skips strings (playing octives).  The riff can be heard at 1:30
(A similar riff is played at 1:00)
It seems to be 270bpm.  I can get nowhere near this…somewhere around 200 I struggle.  It does seem that I can play it better/faster while converting every group of 3 to 4…assuming this is bc I am playing it with strict USX elbow motion at this speed.  Is this a common feeling with this mechanic (i.e. cramming 4 notes in with no slant change vs 3 notes with slant change)?  Forgive me if this is poorly written!  I can get video of myself if that would help
 
      
     
   
   
  