I have great news! I finally received the swage die this morning and made some slugs using JSB monster 25gr pellets. The hollow point works the best. The round nose slugs are all over the place and not worth making again. The slug that comes out the swage die is 5.500mm in diameter which is what FX barrels like.
I shot a group of 6 at 25m and got a group size of my thumb nail. It should also group like this at 100m, but I will test that this coming weekend.
Thank you again for sending me this. I am finally happy that I have a working slug for my FX.
Thanks Jan Coetzee. Thank you for your feedback.