I am ready for a new barrel on my Savage model 10. It is in an Ashbury Precision Ordnance Saber chassis. I am limited to 600 yds, have an inventory of 147 ELD's, and H4350, Varget & RL16, I assume 8 twist and 24" length is what I should be looking at, but would consider other suggestions. Is there any disadvantage to going a little longer in length? It will be shot from a bench.