they are 15.9grain ones.

5.52 mill skirt.

shoot just a bit better than the tin of 5.51 jsb and aa fields i brought last week.
1.2 inch group with the aa fields with pellet lube but the lube messed up the crono!

i think the barrell is a good one as the engineer at daystate said i have got a good one as he fired it in front of me and did a tidy group at 50 yards. much better than i could do that day!

gonna try the 18.1 grain heavys in a few weeks when i can get hold of them. quite hard to get hold of i am finding.

don't think its down to batch so much as different batches have all produced very good results.