I have just had a similar experience from a similar distance with the Fx Hybrid Slugs in .30cal from my Maverick VP. Take a look at the video shown below:
https://youtu.be/WzzQ1jtwfBM
I did not retrieve any fragments from the squirrel, but there were certainly two distinct exit wounds at that distance.
I also was able to use the same round on a squirrel at 73 yards, and it zipped right through the shoulder and made a full passthrough:
https://youtu.be/X7hhD70_0SU
I have been very impressed with both the accuracy and terminal performance of the Hybrid Slugs at distances over 50 yards. The flat meplat on the Hades seems to deliver more smack on the smaller game, but the Hybrids have also shown their effectiveness with one and done bodyshots on groundhogs.
https://youtu.be/H9yRk0YERMM
All shots were at 930fpe/85fpe from the muzzle:
I have detected some raccoons on the trail cam at my rental property messing with things, so as soon as I get my thermal scope sighted in on my Maverick, I'm going to give the Hybrids a try on the raccoons. If they are successful there, I will be ordering another 1000 rounds and make these my default ammo for the foreseeable future.
I must also admit, before the FX Hybrids were announced, I was trying to make something similar than that for my Benjamin Bulldog. The reason I tried to do this, was I wanted a thinner sidewall and a lighter weight slug to promote expansion, while at the same time, having a longer slug that worked with my Bulldog's twist rate. It's great to see my ideas come to fruition, which lets me know I was on the right path. The only potential downside of this design is performance on larger game, like coyote and hogs, so there may still be a place for 54.5gr NSA slugs in those applications. I'm going to do some more ballistics gel testing to see what things look like at 960fps.