Both are prone to ejection issues due to the short case length. Lengthening the ejector travel fixes the problems. I haven't used those exact cases, but I've had a 20 vartarg and 20 BR and both worked fine after the ejector modification.
If you're not familiar with the mod, I think a search for posts by Sharpshooter with "ejector" as the keyword may bring it up.
*found it in the Savage FAQ's:
http://www.savageshooters.com/conten...hen-an-Ejector
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