I'm interested from a technology standpoint but I don't see anything that would incline me to switch. I also wonder why its so slow for the bullet weights used.

www.polycaseammo.com/

Hmm using a propeller nosed polymer matrix projectile to do the damage.
Interesting.
I wonder if the flight noise is increased due to the propeller.

But what if the rifling is right hand twist??

Then there's that "down under" problem. You know...Where everything is backwards.

Bushmaster wrote:

But what if the rifling is right hand twist?? Then there's that "down under" problem. You know...Where everything is backwards.

then the bullet comes back where it came from when you hit your target. But "down under" they are trained for such things, remenber the "boomerangs"? Or how do you call in English that stick they trow away and that returns (most of the time even without the help of a dog)?

Interesting read. Copper and nylon mix. I assume the shape is meant to transfer energy at a greater rate to make up for the lighter weight. I didn't read every FAQ but greater velocity is also mentioned. I won't be trying them as self defence rounds I don't need and plenty of cheap lead core bullets to be had for inexpensive paper punching, IDPA etc. In fact I pretty well stopped buying pistol bullets as I shoot my own cast.

I looked at the .40 S&W load, 107 grain bullet @ 1350 ft/sec. I'm do that velocity or better now with 135 grain JHPs.