[STEINBVG]

I found this description of Gevarm rifle outstanding feeding and ejection quality( besides others), this should be applicable to any weapon:


...The gun fed and fired every type of ammo used ranging from standard velocity (Remington sub-sonic), hot truncated bullet, Remington Yellow Jacket and ultra-hot CCI Stinger. From solid to hollow point, the gun ate them all without a hitch. Even ammo that had a slightly bent and deformed bullet nose that jammed on other guns, performed flawlessly with the Gevarm.

The secret to the gun’s outstanding feeding reliability relies primarily on the feed ramp. Very few weapons in its class have this unique feature which assures trouble free operation. The rear end of the barrel has a built-in extension approximately 3/ 4-inch that encloses both sides of the magazine lips. Just below the chamber mouth of the extension is a well designed and perfectly machined and polished feed ramp. When a loaded magazine is inserted, the magazine lips seats slightly lower than the “U” shape barrel extension positioning the top round almost directly in line with the chamber mouth. As the bolt moves forward, its sides rides over the barrel extension, striping the top round from the magazine and assisting the cartridge towards the chamber and fires it as the breech comes to a full stop. The superb bolt to barrel extension arrangement virtually eliminated any side play or misalignment of the cartridge towards the chamber as it is being stripped from the magazine. The barrel extension prevented the cartridge from misaligning itself while, and after, it was being stripped from the magazine lips, it simply directs the cartridge to move straight towards the chamber with virtually no hesitation or snag. In addition, the magazine itself is positioned higher than in a normal self loader, preventing the usual tendency of the cartridge nose to glide upward as it hits the feed ramp prior to entering the chamber mouth, which in some cases contributes to jams as caused by lead being shaved off the bullet by a sharp unpolished chamber mouth or ramp.