Which pellet size is best is basically individual to your barrel.
Cartain barrel types may favour a certain brand/size but until you have tried them all you won't know for certain. That said by the time you have done this and found the pellet for your barrel the die that the manufacturers use may have been changed and your back to square one.
As HillBill said if you are getting good groups then I wouldn't worry.
Mine is a .22 and I was told that it likes 5.51 AA diablo field by the bloke I got it off so I use those. It seems fine to me.
Cartain barrel types may favour a certain brand/size but until you have tried them all you won't know for certain. That said by the time you have done this and found the pellet for your barrel the die that the manufacturers use may have been changed and your back to square one.
As HillBill said if you are getting good groups then I wouldn't worry.
Mine is a .22 and I was told that it likes 5.51 AA diablo field by the bloke I got it off so I use those. It seems fine to me.
