You know I think I may have a partial answer for you... You do not say which bullets or which sabots... but that 504 is a generous 504 and you will probably need to use a MMP short Black sabot. Anything like a HPH-24 or a Harvester will be to loose.

I can not really tell from the picture on the hood of the truck - but I am thinking those are probably HPH24 sabots. If you have any of the old Knight sabots for days long ago they would also work but they would be the old polymer formulation.


Nevertheless that gun will shoot sabots... but it used T7 when it was shooting well.

Here is a few of many...







So now you have you work cut out for you...