I'm looking for what works for whitetail hunting in a 20" 1/9" twist barrel on a Remington Model Seven. I've read everything from 100-140 grain for deer, but seems most say the 100-125 range is sufficient for the size of the deer in Pennsylvania. I'd like to shoot something that performs well out to at least 300-400 yards. There are places where longer shots are available, but I'd expect for this gun, where I hunt, 99% of the shots will be well under 500 yards. I haven't reloaded a single cartridge in my life. I've read the ABCs of Reloading and a .260 reloading manual. I'm planning on picking up an RCBS kit, case trimmer, and 750 scale whenever I get a chance to run to the wholesaler. I'd like to get some loads worked up for hunting next year. Any thoughts/suggestions/ideas (I know I need to read more and watch some videos or find someone locally who can show me the ropes)...I'll take them. Thanks in advance.