The first time I tried to rack the bolt it took quite a bit of force to get the handle upright and bolt pull was very rough. Turns out all three springs that put tension on the bearings were different lengths so only one of the bearings had the correct tension, and the other two were just rolling around freely out of their little sockets and bunched on one side near the secure one. So when I tightened the end cap screw, the handle tilted a little making the cylinder rub hard up against the left side of the receiver as I pulled everything back. After I discovered this, I cut all the springs down to the same size and the bearings now have even tension and stay in their correct positions. The handle is no longer crooked and now clicks when rotated, and bolt pull is 98% easier!
Now I just need to take care of that cap screw...