305 on a 10 inch rim is too wide in my opinion.
Most I would go on a 10 inch wide rim is a 295, tires on wider rims over rim width range will cause excessive tire roll, wider rim size and narrower tire will be opposite and be alot sitiffer.
Since a 305 on a 10 inch rim would cause more tire roll, if it was on a 10.5 - 11.5 rim would have less tire roll