Does it matter?

[sdmc530]

I took some test loads to the range today. I used a rest and shot 3 round groups then a dozen or so more to get a feel for the rounds. I had 8 I was trying with different powders and what not but of all the loads it seemed that the Hornady rounds did the best performance. I loaded some Berry's and some Mag-tech. The rounds where all pretty similar but the Hornady just had better groups as a whole. I can not tell you velocity I don't have a chrono and I used the same gun (cold) for all the shots. I would shoot the 3 then let is cool and start over.

Is there any validity to one bullet being that much better than others???