I have gunsmith question if any one has some helpful advice. I Have a standard tikka t3 varmint .308. I have not really used it much last three years other than putting holes in paper/steel with some ex nato 7.62 ammo, brought a large amount about three years ago, no isses with it. Lately I thought I'd start using the .308 for hunting again. So gave it a check zero with my RWS 150 KS ammo which again I brought a large anmount about four years ago. Zero was spot on but decided to put a new scope on so probably did 15-20 rounds of which one jammed. Used it a few times since, no issues.
This morning every round I tried jammed with the RWS ammo, had to go home and get another rifle. It doesn't go in the last 3-4 mm and the bolt won't close. I've not dropped or knocked the rifle or bolt, no obvious signs of damage. It's well cleaned. The Ammo has been kept in the same place as nato ammo again well looked after. I should of tried the nato ammo to see if that still fitted. Last used the nato ammo a few weeks ago and did about 30 rounds with no issues.