Re: 7mm RUM & Barnes TSX\'s
I don't have any loads for you, but I generally drop one bullet weight when shooting Barnes to compensate for the OAL of the bullet.
i.e. 25-06 I shoot 87 and 100 gr Pb core bullets and 75 and 85 gr Barnes
300 SAUM I shoot 150 gr ABs and currently shoot 140 gr Barnes X. They have been d/c'd so I will have to try something else or just drop Barnes completely (more likely).
270 Win 130 and 140 gr Pb; 120 Barnes
For elk with the horsepower you have in the 7RUM, you can shoot the 140 TSX for deer and 150 TSX for elk. Personally for elk, I would try some of either 160 AccuBonds or Richard's 160-175 gr Bonded bullets.