You installed the barrel on the receiver, then you installed the bolt and it would not close, that happens every time because the bolt must be indexed, the cut in the bolt face (extractor cut) must align with the bolt way (right side) when when the barrel is secured to the receiver.
I am the only person on this forum that is proficient with a feeler gage, here is what I do, screw the barrel in until it bottoms our, then back the barrel out until the bolt way on the right side aligns with the extractor cut, just for fun you can install the bolt (because I am not hung up on head space gage) I determine head space with the barrel backed out.
Back to alignment of the extractor cut and the alignment, once the barrel is bottom out and then backed out to align, a feeler gage can be used to check the gap between the front receiver ring and flange at the end of the threads on the shank. The gap, measured in thousands, will indicate the distance the shoulder at the of the threads must be moved forward to align, and there are index marks on the receiver and barrel, others refer to these lines as 'draw to lines'.
After you have tried this method and or technique let me know, do not attempt metal removal yet. There is a matter of crush and stopping short of perfect alignment, the nice thing about the Springfield, the threads are 10 per inch,
The bolt can not be installed unless the way RS and extractor cut align,
F. Guffey