What about copper build up? Does he have a problem with a lot of copper deposits inside the barrel as compared to other bullets?

I hope to try these bullets out as well because when 'yote hunting often fox come in and from the reports in Balistic Gel they may disinigrate in the fox and minimize exit holes. WOuld love to hear a report on a 223 grenade launched into some fox.

I was reading or watching something, and it said that the bullet is so fragile, it will explode if you shoot a grape.

This is article I read on http://www.nrapublications.org/TAH/Barnes.asp them and a utube I found on it. Have not seen the utube but this si the link http://youtube.com/watch?v=sYigC49tnh8

cool.....i wish they made a 55 grain

Varmint Grenades are WORTH IT! They are a great bullet. They just vaporize prarie dogs. They have a very brittle core and a a hollow pocket in the top of the bullet. They explode! Barnes has a video on their website of it hitting a grape. here's the URL:

http://www.barnesbullets.com/information/high-speed-video/

Has anybody shot fox with them? I want to know is they exit or explode in the body cavity. ANy exit hole exams on a few fox from anybody yet?