Last winter, my son won a Rem 700 in 270 wsm. ( $5.00 ticket)
Checked the feeding etc with snap caps he had. He took it to the range when he could finally find 270 wsm ammo. (My rules, use factory ammo on new/newly acquired guns!)
At the range, with some difficulty, it would feed Factory Ammo ( Winchester brass cartridges). With some effort he got it to chamber rounds . He fired 5 rounds to satisfy himself to it's accuracy. Shot about a 1/2" group. But, it left ejector – extractor marks on the cartridge.
He then drove up the road a few miles to a well know gunsmith/long range shooter. Thought he would have to leave it to be picked up at a later date. But, the smith worked it right away.
The bolt, was disassembled and the bolt face polished along with the extractor, ejector, feed ramp.
Works perfect.
Cost $35.00 for smithing, so now he has $40.00 in the rifle. No marks on the cartridges.