I actually covered this in another thread, but it's way down.
When I first installed a .308 barrel in my Garand, it was throwing the empty cases 20 Feet to the right. All kinds of suggestions were made but I got this suggestion from Gus.
He said to pull the bolt, disassemble, take the small Ejector Spring out behind the Ejector. With cutters, clip one ring off, essentially shortening it a bit. Try it out ... if necessary, remove and clip another ring off.
It worked for me.... my cases now drop nicely 3 Feet to the right.
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