I have a new Christensen 300 RUM. Has the normal 1:10 twist. All the RUM’s I’ve ever owned have had the 1:10. I’ve always shot the 200g Accubond and ELDX without issue and been happy with results. I’m sure the only real way of knowing will be to shoot them, but would the ELDX 212’s be too heavy out of the 1:10 Ultra? I’m just trying to save a few $$ if those that are out there have any experience. I used Bergers calculator but not sure of the accuracy. Also wondering if the bullets are just too long for that rifle.