Below is an instruction that describes a task. Write a response that appropriately completes the request.

### Instruction:
What are all the 300 m group (mm) with a .308 winchester cartridge type of ruag swiss p target 168 gr hp-bt

### Inputs:
table_name: table, columns: ['.308 Winchester cartridge type', '100 m group (mm)', '100 m group ( MOA )', '300 m group (mm)', '300 m group ( MOA )']

### Response:
SELECT 300 m group (mm) FROM table WHERE .308 Winchester cartridge type = RUAG Swiss P Target 168 gr HP-BT