WHAT DOES H335 VS CFE223 MEAN?

I normally provide 100rds of 26gr TAC less than Nosler 55grBT's with me for when we have a stage wherever we are going to be capturing scaled-down targets at 100yds or further.Okay happy I asked.  The CFE posts superior groups And that i have already got it found out so I am going to roll with it.I am new to reloading myself this year for rifle. I