Couple notes I would like to add that I dont think have been covered yet.
1. Seperate brass and shoot one headstamp at a time
2. Remington is good brass but I believe it is a little thinner than most other brands. Thinner= more case capacity which changes pressures and will change the sweet spot for a particular bullet.
3. I dont like 40 grain bullets in 223. They have to be seated to far back to get a good hold in the neck. deep seating = long jump which will wear the barrel faster and reduce accuracy. 40's are quicker (reduced barrel life) and expand faster (tears up game)so I tend to overlook them.
4. Enjoy the boonies - I have to drive 45 minutes to shoot on a 100 yard max range. Mail order would work well for you on all but powder ($20 hazmat fee + shipping). www.midwayusa.com
is my favorite. They have great prices, fair and honest shipping and they list whether it is in stock or on backorder. They carry the 46 grain hollow points you mentioned.
5. You cannot read to much or be to careful.I believe you stated you were new to reloading. Make sure you do everything in a safe manor. Work up loads slow, keep an eye on Cartride length, check brass well before loading and look for signs of excess pressure.
6. flat base bullets are harder to seat than boat tail designs unless you put a good inside chamfer on it.
7. Ask lots of questions and we will answer what we can
8. BE SAFE!
Hope this helps ya out-