Rimmed, Rimless and semi-rimmed

Does haveing a rim on the cartridge affect the bullet in anyway?
or does it affect the accuracy or reliabilty of a gun?

 

I believe that only thing rim affects is reliability and maybe a bit with accuracy (rim helps closing chamber).
Rim has more to do with gun action.

 

ok thank you i already have information on the rim inside the mechanism so thanks anyway Notmi

 

Rims are primarily used on straight wall cartridges to provide a stopping point when loaded into the chamber. Shouldered cartridges don't need rims as the shoulders stop in the chamber.

Rims are on a lot of older cartridges with sholders like the .303 Brit and 7.62X54R Russian. This is because when they were developed, the current technology was rim oriented and the developers simply went with proven technology.

Rimless cartridges feed more reliably and give more room in the magazine.

Some match shooters who use rimmed ammo (rimfire and revolver) check the rim thickness on the cases as they believe different rim thickness positions the case differently in the chamber.

 

If it had any bad effects, the British wouldn't have kept the .303 for nearly 70 years, nor would the Russians still be using the 7.62x54R in front-line weapons after more than 110 years.

Tony Williams: Military gun and ammunition website and discussion forum

 

speackin gof the Brits do they still use the same Handgernade?

 

The same Handgrenade as when? Last week? Last century?

The 1940s era genade is no longer in use.

 

Just had an amusing image of British infantrymen storming forward in Iraq throwing 'pomegranite'-type grenades with lit fuses! :lol: