Ok here are the results for my first test rounds. Four of the shots were not to bad and one flyer.
BTW the recoil seemed to be a bit more than the factory magtech rounds.
8 inch target at 10 yards.
I know this is an old topic, sometimes I miss lots of posts and I can't keep track of them all.
Looks like you got it going on M113A3
The bullet you are using is a typical Magma bullet from commercial magma molds
http://www.magmaengineering.com/magma-custom-bullet-molds/Magma 44-200 RNFP BB "Cowboy"