Re: 338 Lapua cases stuck in Savage gun?
I think that should be fine, if you don't trim any shorter than factory Lapua cases.
Are your cases totally clean? I'll emphasize again that carbon fouling on the case bodies can cause them to hang in a tight chamber also.
See if you can slip a bullet into the neck of your fired cases... as I mentioned, with Lapua cases I can, but my Hornady cases don't open enough to actually let a bullet slip through the neck. Thicker case necks I'm assuming... haven't check that yet...