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7MM RM 140's in factory and a 24" bbl. I'd suspect real world velocities of about 3000fps.(never chronied 140's, but I have on 150's and 160, and 175's)
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We chronographed 3 different factory140gr 280 loads,and all reached 3000fps with a 24" barrel.Factory 140gr 7mmremmag loads reached just over 3100fps with a 24" barrel.Factory 130gr 270win loads reached about 3000fps out of a 24" barrel on the same chronograph.
My 140gr 280AI handloads produced 3150fps out of a 24" barrel, on the same chronograph,and 140gr 7mmremag handloads produced 3250fps with a 24" barrel.There were no 270win handloads to compare that day.