I am currently building a 284 win on a savage 110 long action. I’m thinking of going with a Shilen varmint 26” barrel. Wanting to use this for hunting mainly but might get into some recreational long range shooting. Also wanting to lengthen throat or free bore to achieve the full capacity of this cartridge. I’ve spoke with Shilen and they told me they only have the saami spec reamer but if I would send them a dummy cartridge with bullet of my choice the would custom fit it to that bullet. I have some hornady 162 gr sst on hand and could seat them out to 3.000 oal. Would this be beneficial to achieve my goal. Also which barrel twist would be recommended. Any other recommendations would be appreciated. Thanks