I'VE BEEN RELOADING FOR 60 YEARS......
There are some basic things with rifle brass...and they are different from pistol and important.
1. If you choose to necksize, you can ONLY use the ammo you reload in ONE rifle. If you decide you want a different gun, or shoot with a friend, you likely will not be able to use your reloads. I recommend you full-length resize and buy a CASE GUAGE in 30-06. If it fits in the gauge, it will chamber in 99% of all guns.
2. LUBE cases (spray-on lubes work well) and resize the cases.
3. Measure the length of the SIZED brass with a micrometer tool. Look in reloading guide for case length and minimum case length. If there is a variable, trim all to within .002 of proper length. BE CERTAIN TO USE BRASS WITH THE SAME HEADSTAMP. With rifle brass, you are using a lot of powder and internal capacity varies, sometimes considerable. Therefore accuracy will suffer....more powder capacity changes the pressure, and the impact of the bullet.
4. I found the LYMAN Brass X-Press tool is a good buy (Very accurate, and very fast) if you do not have a trimmer. Otherwise use what you have.
5. Chamfer case mouths inside and out. If you do not, you will score bullets and affect accuracy.
6. Depending on powder measure, choose the powder by shape. Sticks (Varget) do not meter well in a Dillon Press, so use spherical powder (AA 2520). I love Varget in the 30-06 and use an RCBS electronic powder dispenser. In the Dillon, AA2520 is terrific.
7. Use Federal or Blackhills Match as a standard compared to YOUR load in terms of accuracy.
8. Start with a known accurate bullet, like 168gr. Sierra MatchKing, for accuracy determination.
9. Seat to a known OAL and use a seating plug that is appropriate for your bullet. If you use a std. seating stem(plug) with Hornady ELD bullets, you will damage the surface and thus, the accuracy.
10. If you use a rifle magazine, be sure to apply a very shallow taper crimp. I use two dies, one to seat, one to crimp.
Check OAL in a good quality case gauge.