JSB 22 cal. Pellet head size

"PlanB"
"manabeknives"The pellets can also be ordered from Bori at Topgun-Airguns. Just ask Bori for the head size you wish to purchase.
http://www.topgun-airguns.com/
Mike
Can you see a difference in head sizes? 
I already have a bunch of JSB 18.13 22's from p a because they pack um better for less bent pellets. I think all they have is .52?
What I can notice is the precision on which they shoot. The 5,52 in my rifle shot fine...it's just that when I tried the 5.53, the shots tightend-up with a little more consistency. I shoot 100 shoots at a target to test the pellet/gun consistency. I had a few flyers in the 5.52, while I had none in the 5.53....this trend has continues thru several tins of pellets. 
You may not get them same results as I do due to the fact that I have a custom barrel fitted to my rifle. But I have tried a variety of head diameters from 5.50-5.54.....5.53 shot the best from MY equipment.
The Tins from Pyramid are in the 5.52....though they are not clearly marked and they do not sell them in different head sizes
Can I physically see the difference between the 2...NO, but my rifle can :)
Mike