In Lyman's 49th and in the ABC's of reloading danger is often mentioned. How dangerous is reloading if one follows directions? Is it possible for exaple for a case to fail and the gun to explode or to throwback fless, blinding, searing gas?
If you follow the directions, use recommended bullets, brass and powder, and dont go over MAX loads its very safe.
I think the biggest danger is seating a bullet into a primed case that you did not dump powder into. Once you are ready to seat bullets DOUBLE CHECK with good light to ensure powder in each case.
Worst case scenario is you shoot and the primer only pushed the bullet an inch or so into the barrel and then you chamber and shoot the next round- and your barrel and action explode, rare but lots of documented cases.
Just follow the manual and work up from minimum and there is no danger.