Over time I noticed that there were two options, the light grey foam and the black foam. They both came in the exact same package with the same upc code even though they were slightly different.
I made some with the grey stuff but it just doesnt cut it and will not work with my brass or petg. The skin seems to grab at the inside of the barrel while being fired. It is also also a bit thinner meaning more air escapes around it.
I made some with the black stuff and was completely blown away range, velocity and accuracy all went up. I have been using this black stuff since I came across it.
Recently I noticed that stores stopped selling the black stuff so I called the company and they informed me that it was black but now they have changed their foam and will be distributing only the light grey stuff from now on.
I have tried using white foam but it is just not the same. It carries the same distance in the rapid fire but in my ABBB it slows down big time.
This is the company that I used to buy from.
![Posted Image](http://img295.imageshack.us/img295/4904/fbr9ht.th.jpg)
This is the difference in stefans color.
![Posted Image](http://img129.imageshack.us/img129/8913/fbr27aa.th.jpg)
Can you guys reccomend a brand of 1/2" stefans that work well in 9/16" brass because it looks as if I am going to have to start ordering off the net.