[Crim]

True that....but if what you are using as a case wont hold the pressure of fireing the projectile...then it useless.

I just cant see using a plastic case based round in any of my firearms.

I will stick with whats tried and true.

[ctdonath2]

I’ve used polymer-case (brass base) ammo before. Performed quite well actually. To my surprise, it actually seemed to clean the chamber: the textured plastic surface apparently scraped crud out.

[gundog]

...but if what you are using as a case won't hold the pressure of firing the projectile...then it useless.

The chamber walls do most of the heavy lifting.