Thread: load issue, or loader.

I have just tested 3 reloads for my .300wsm from a tried and true recipe, i once had 200 of these loads and now have 20 left so i started reloading them to the exact same recipe, i used to get 1\2inch group but now looking at 3 inch with my loads.
The rounds are tight chambering and very tight ejecting and have these marks on the face of them.

Any one have any ideas. The tightness would be shell length wouldn't it if the loaded round is the same length as the old reloads that dont give issues.

Its my first attempt at reloading so not sure about things yet.