นี่ลอกมาจากคู่มือของปืนนะครับ
Remington® Model 870™ Pump Action Shotgun
This is a brief excerpt of the Remington® Model 870™ Pump Action Shotguns owners manual to read the entire gun manuls check this link for the Remington Model 870 and the links below.
Congratulations on your choice of a Remington 870 Pump Shotgun. With proper care, it should give you many years of dependable use and enjoyment. For best results, we recommend that you use Remington Ammunition – the ammunition used in factory testing your firearm against our exacting function and performance standards.
ตรงตัวสีแดงบอกไว้ว่าทดสอบปืนครับ ไม่ต้องกังวลให้ปวดหัวเปล่าๆครับ