Are there any performance or feeding/chambering differences between regular full metal jacket and TRUNCATED full metal jacket?

 

I ordered 500rds of Fiocchi 124gr 9mm FMJ truncated. Didn't realize they were the truncated version until this morning when I reviewed my order, just thought they were regular FMJ's.

 

Whats the reason for the "truncation" or the flat top of the bullet? I'm just hoping they won't cause any feeding issues or excessive wear on the feedramp?

There are two reasons I know of for truncated bullets. Some semi-auto's don't like pointy bullets, truncated bullets often clear up feed issues. Your mileage may vary.

 

The other reason for truncated bullets is in tube fed, center fire rifles like the .44 magnum Henry rifles. Since it's tube fed, you don't want the point of one bullet pushing squarely on the primer of the bullet next in the magazine.

No worries. Almost all .40S&W ammo is flat point and I have not heard of anyone's feed ramp wearing out. Besides, copper vs. steel is no contest. Steel wins everytime. However, if you're still worried I'll take them off your hands and dispose of them safely.

You'll get nicer, cleaner holes in the target.