Nope
I will say that infantry with a polearm can bring my horse to a stop but I don't worry I see cav running at me like I used to in Warband. I don't think I've been "one shotted" in Bannerlord at all. Cav now just bunch up and try to scratch each other to death with long sticks.
Now that you mention it I did notice it was unlocking parts I already had.
It's just .223 necked up to 6mm. I was shooting 87gn VMAX in an AR.
I haven't hit a pig with it yet, I was using a 6x45 but wanted more punch.
It is the way.