Read the sticky on how to properly assemble the Ross rifle bolt. First of all, with the bolt in the rifle, when the bolt is fully open and in the rearward position, there should be a gap of about one inch between the back of the bolt lugs and the front of the bolt carrier (the part with the bolt handle on it.) If it is only about 1/4 inch space, then you have a wrongly assembled bolt. ABSOLUTELY DO NOT FIRE IT IN THIS CONDITION. IT WILL NOT BE PROPERLY LOCKED.
If fired with a wrongly assembled bolt, the locking lugs engage only about 1/6 of the area that they are supposed to. When fired, the bolt will shear the left locking lugs, come back, and hit you between the eyes. This is usually fatal. YOU HAVE BEEN WARNED.
Take a flashlight, and shine it into the rear of the receiver ring when you are closing the bolt. You should be able to see the locking lugs on the bolt fully close and seat.