That was with a totally original condition rifle. Nothing added at all. Also using nearly 50 year old surplus fmj ammo.
That German who shot the test target must have been something else.
Wow. I salute you! Well done! A man-sized target at 400 yards is excellent with a military rifle, iron sights and military ammo! Very few can do that. I probably wouldn’t do it at 300 yards with iron sights now (old eyes).