Ok, here goes.
Yes, make sure all your cases are fully prepped and primed. At home, you will need to have done some preperation for "throwing" powder charges at the range. You will need a powder measure that has a micrometer insert so you can "return" to a previously measured weighed about of propellant. Example, I use an RCBS Uniflow measure which has the micrometer insert. At home I decide upon a range of propellat; say 44 to 49 gr of H4895. I throw 10 averaged charges of powder until I get 440 grains. I write down the micrometer setting in my log book. I do this over and over, increasing the micrometer inserts readings and thus increasing the "thrown" amount of powder until I have 49 grains. The pit fall of this is using large grained extruded propellants which most of us can't get better than +/_ .02 grains repeatable accuracy. Spherical powders and small grained extruded powders are wonderful for this. I deveoped a load using H4895 with the Hornady 75 BTHP Match which shoots 10 shots into 10" at 600 yards with my 16" AR15 topped with only a 2x ACOG scope.
Once you have the propellant matter out of the way, you will need to focus on bullet seating. I use the little Lee press which ran me about $15 each; I own several and dedicate them different purposes. Like my Forster Ultra Seater for 30-06 is on one an is never taken off, thus I trust the accuracy of my OAL with 30-06.
For a mounting surface for the press and powder measure, I use a 3'x3'x1" thick piece of MDF (Left over from building my reloading bench) which is predrilled for mounting the press and measure. I use C-clamps to hold it to my fold up pic-nic table I bought at K-Mart for $50. I have a large (6'x3') working area with the whole set up.
The secret to repeatable accuracy is to develop a VERY REPEATABLE routine of "throwing" the powder charges. Consistency is the key.
Anyway, once I'm set up, I can load ONE, 1, Uno, round, shoot over the chronograph it and immediately decide if I want to load up another or move on up in charge weight. No having to run home and pull bullets and dump powder. If I need more of the same rounds, I can load it up while the barrel is cooling. Better than listening to that ditty of a song from a game show in your head while waiting for the barrel to cool between shots.
The second pitfall of this is wanting to take too many bullet and powders to try MANY combinations. It can be addicting. /ubbthreads/images/graemlins/wink.gif
Big Al