I modified it a bit in that I picked the max load I wanted and kept dropping charges in 2% increments until I hit minimum.
I used 3 shot groups in round-robin from a clean barrel. 6 total zeroing and fouling shots. 2 minute intervals between shots. The sequence is 1-3 on the top and 4-6 on the bottom.
Here is a pic of the results:
![Image](http://i1209.photobucket.com/albums/cc397/HayCreekJohnson/OCW_hdy_barnes26.jpg)
You can see that groups 2,3 and 4 produced similar sizes and impact locations, just as Newberry described. Based on that, I chose the load for group 3 as my OCW. According to the theory, I now have a charge weight that can vary +/- 2% and still group them closely. Note that groups 1 and 6 have 2 bullets in 1 hole each with a "flyer". Newberry advises against considering them as they are not variable tolerant.
From there, I set up a test to find the best bullet seating to shrink the group as shown here:
![Image](http://i1209.photobucket.com/albums/cc397/HayCreekJohnson/seatingtestHdycase_sm.jpg)
For this combination of components, it looks like 0.060" freebore is where I should start. The next step will be to work +/- .005" to see if I can tighten it up even more. I'll be shooting 5 and 10 shot groups for verification. Using 3 shot groups is just a quick way to get in the ball park.
Hope this helps some of the newer reloaders in quickly finding a load for their 204 or any other caliber rifle.
I'll post the results of my final tests when the weather permits. It's lousy hot and humid here.
Hedge
Weather cleared up and I got to shoot my test loads. 3 fouling shots and then 3 5-shot groups in round robin with 2 minutes between shots. Seating depths at .055", .060" and .065" from lands.
Here are the results. Got a little excited on the forth shot of the 1st group and squeezed off too soon. Target squares are 1". I skipped the 10 shot sequence as to my mind, 4 hits in 1 hole, round-robin iisn't a fluke.
On the previous test using 3 shot groups, the .060 seemed promising but 5 shots gives a better picture. At any rate, there's the sequence of load development I'm using. Seems to work with a minimum of rounds. The Ladder test should be just as valid but requires a longer range than most of us have at our disposal.
![Image](http://i1209.photobucket.com/albums/cc397/HayCreekJohnson/5shotgrouptest.jpg)