Re: 12 Ga. trajectory charts
Go to the Federal site and they have a downloadable ballistics program for slugs.
Try to find the BC of your slug and MV and then compare it to a Fed slug.
My guess would be with a 100 yd zero, 1500 fps and you will be somewhere around 20-24 inches.
My 20 ga 3" fed tipped Barnes expanders are just under 14" low at 200.