Re: 300 grain 338 Lapua speed out of a Savage?
that burr might be pretty normal, depending on how deep it is... is this Lapua are Hornady brass? Hornady is pretty soft...
Retumbo will peak later than H1000, and would probably give you that extra bit of speed you're looking for.
That said, it sounds like your accuracy is fantastic, so I'd be hard pressed to change anything.
Run some ballistics tables and you'll see that the 50 fps difference isn't really going to mean all that much at the target.