Looking to start a 300 WM build. I want to shoot mostly bullets around 210 gr. I don't want anything shorter than 26", however I am willing to go longer than this. What would ya'll recommend for a barrel length to get the most velocity out of this round? I am also looking at a 1-10 twist. Is this the optimal twist for that grain bullet, or do I need to look at other twist rates? The intended purpose of this gun will be long range paper punching (1000+ yd) and hunting across open fields. This will also be a heavy barrel rifle, as I have no intention of doing any packing/hiking with it. I have others that fit that bill.