We are 99% sure that we now have a viable slug that you can use in your RAW HM1000x now. One that is magazine friendly and easy to chamber. We will have all data in by weeks end, and are confident we will get the “ideal” results! So, if you would like to have an alternative to pellets, you may soon have it! Will definitely keep you posted.
Happy/Safe Shooting,
 Al Clark/Aeromagnum Aeromunition, LLC.