7 rem mag velocity expectation

My factory Ruger 7mag had a 24" bbl. and I couldn't make it to 3000 fps with a 168 Berger. Re-barreled with a 26 incher and found a good node at 3050fps, and for 180gr at 2905fps. Could I go faster? A little, but I wouldn't go for speed at the expense of accuracy.
 
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