Hi, a while ago I tried sone JSB Exact Express in my 1322 and found it very accurated. I also noticed that they had a very " shy barrel mark". I used other pellets like H&N Barracuda and Gamo and they had good marks. Is it normal?
Pellets come in differnent head diameters because some barrels like smaller or larger sizes. Also pellet manufacturing is not perfect. They can vary from batch to batch. The important thing is are they shooting good for your needs. Finding the right pellet for your individual gun is very important.