As above, when you stretch a compression type spring you damage the structure of the steel, ruining it.
Usually the spring will collapse again, and may just break.
Make sure the magazine springs are in the mag correctly. Often they get turned around.
Look for burrs on the chamber mouth.
TRY DIFFERENT AMMO. Often that's all it takes.
If you're using dummy cartridges, make sure they're action proving dummies. Action proving dummies are the exact weight, size, and balance of live ammo. Other types of dummies are not.
In any case, dummies may not give an accurate test that only live ammo can.
Take the action out of the stock, remove the recoil spring and test the action for binding. Put it back in the stock without the spring and test again for any binding caused by the stock.
As above, inspect the magazine catch to insure it's holding the magazine all the way up and not allowing it to tilt.