A few of things could be happening.
If it is hard to close with a round in the chamber you need to reheadspace.

The Primary extraction ramp may be interfering. Back the BAS off one turn and see if it closes easily.

The bolt head may be longer and the end of the bolthead is touching the breach face.


Someone may have modified the cocking piece position or the bolt internals and it needs to be adjusted or correct parts installed.

Savagesmiths come in a variety of mechanical aptitudes. Therefore used parts and assemblies are like a box of chocolates.....