Should be tight, but should be able to move it just a little. To do a somewhat easy check, since you don't have experience with the appropriate feel, try shooting your other ammo and see if it still cycles fine. If it does, probably an ammo problem.
The rifle spring is the same as the pistol spring, just a different color. Ghilliebear taught us that. And they are usually a lot cheaper. Or at least they used to be. He stated at one point that he had a whole bucket full of them.