Thank you all!
So, update: the gun didn't have any problem, it was just dirty ahah! I cleaned it and now it works perfectly. The extractor works again for some reason... I have no idea why it stopped working at some point. Perhaps it was just with some specific cases...
I shot a few dozens of both manufactured and handloaded cartridges, most worked well: lever locking correctly, not hard to extract...
Only a few manufactured cartridges caused the lever not to lock. I bought the Hornady Cartridge Gauge for .30-30 Win, and it turns out the ones causing the lever not to lock go slightly less deep in the gauge. I also bought the Hornady headspace comparator, and once again, the cartridges causing the lever not to lock have a slightly bigger (+0,020 in) headspace.
Thing is, even if these cartridges are slightly bigger/longer, they are still in the min/max range allowed (https://bobp.cip-bobp.org/uploads/tdcc/tab-ii/tabiical-en-page70.pdf).
Is it a common thing for a brand new rifle to be so picky about the cartridges dimensions?
So, update: the gun didn't have any problem, it was just dirty ahah! I cleaned it and now it works perfectly. The extractor works again for some reason... I have no idea why it stopped working at some point. Perhaps it was just with some specific cases...
I shot a few dozens of both manufactured and handloaded cartridges, most worked well: lever locking correctly, not hard to extract...
Only a few manufactured cartridges caused the lever not to lock. I bought the Hornady Cartridge Gauge for .30-30 Win, and it turns out the ones causing the lever not to lock go slightly less deep in the gauge. I also bought the Hornady headspace comparator, and once again, the cartridges causing the lever not to lock have a slightly bigger (+0,020 in) headspace.
Thing is, even if these cartridges are slightly bigger/longer, they are still in the min/max range allowed (https://bobp.cip-bobp.org/uploads/tdcc/tab-ii/tabiical-en-page70.pdf).
Is it a common thing for a brand new rifle to be so picky about the cartridges dimensions?