I have a Savage Striker chambered in 308. I want to reload for hunting deer. I want to use 165 gr. SST, but I am unsure on what the best powder is to use in this round. Being that the gun only has a 12 or 14 inch barrel is that going to effect anything. Some friend of mine told me to use either IMR4064 or IMR4895. just wondering what you guys think. Thank.