I would say that those bullets are a thousandth larger than you want. But I'm not sold on the idea that it's the sole reason you stuck a bullet in the bore.
When using almost ANY powder throwing device to spit out TINY charges, it's asking a heckuva lot from the equipment to do it well.
Were you hand-weighing each charge? I think there's a decent chance that one of your "2.6 grain" powder charges dropped a light charge and that helped you to stick a bullet.
In .380, I get terrific performance from Berry's plated 100gr round nose. They also offer a hollow base bullet, but I've used the flat ones. NO DOUBT, these are more expensive than cast lead. But they work great for me, and in f-i-v-e different .380 pistols.
Attention Brass rats and other reloaders: I really need .327 Federal Magnum brass, no lot size too small. Tell me what caliber you need and I'll see what I have to swap. PM me and we'll discuss.