I've also seen a significant decline in the quality of JSB pellets over the past few years in the US of A, many airgun shooters said they just aren't the way they used to be anymore and I think they ship those, that are determined to be of lesser quality, by their quality control department, to the US. They still maintain their level of quality here in Europe for all I know.
The last time I ordered JSBs, some 4,52mm Exacts and some 5,51mm Jumbos, I ordered them directly from Czech Republic (from Ballistas.cz) and the shipment arrived in a few days from purchase with all of the pellets perfectly intact, none of them were damaged in any form or way, no bent or squished skirts, no scuffled heads or otherwise apparent deviation from their dimensions, like too brim skirts or head-dimensions larger than i.e. for .177 caliber, than that of 4,52mm - max up to .53mm. They were in a sense perfect! All boxes arrived sealed and wrapped up in styrofoam and bubble enveloping, so that the pellets wouldn't get damaged. I have to applaud those Czechs for firmly securing the package! The reason I'm buying pellets from Czechia is simply due to their lower cost there, I'd only get 1 tin of .177 Exacts in my country for almost 18 euros, whilst getting 2 tins for the same price from the Czechs + additional 8 euros for shipping cost.
On the other hand, the H&N pellets quality went down significantly here in Europe over the past couple of years, although not in the US from what I've heard... They're supposedly still ok across the pond.
