In short, yes it works and if you find a load that shows promise, do it again on a different day for confirmation (I personally believe that confirmation is the key). There is no need to use up your barrel life switching recipes blindly in an attempt to prove that your recipe samples will pass muster in statistics class. Just remember the process works and if you can reproduce the results independently, you have a winner. The important lesson to be learned is that if the test works for you and you can reproduce (read back it up) similar results a second time, it is not an accident. Reproduce the same results a third time and you have proven your theory for your gun.
I do my ladders differently as I find the top pressure load with the bullet touching the lands and then back off one grain and do my ladders over a chronograph with seating depth changes of .010" vice incremental powder charges. I use an ogive checker and each bullet will be seated within .0005" and the powder charges will be within .02gr. using my precision digital scale. I noticed that once I got the precision scale, the results were easier to backup on a different day. Anyway, my results in my rifles can be reproduced over and over again and I put a lot of faith in them as my hunting plans and setups are based on the ladder and the second ladder as a proof.
Actually, once I find a recipe that works, I try to disprove that it works by attempting to reproduce the results over and over again. Not once has a recipe that worked as best the second time ever failed after that. Bear in mind, that I am after sub .2moa results or I do not stop testing. For me, that is enough as I would rather spend my time in the field than at the bench. My process usuually yields results very quickly and I don't use up my barrel life proving something to satisfy someone else. I think if you tried it, you would like the results.
BTW, my wife is a math professor and she is amazed that winners at shooting matches are crowned with such small statistical samples of shots on target. Once I explained the process of relays and shooting over different conditions on each relay to her, she was a convert. You don't have to satisfy the statistical "gods" find a shooting recipe that works for you.
I am still waiting for her to prove to me mathematically that a bumble bee can actually fly. [img]/ubbthreads/images/graemlins/shocked.gif[/img]
My friend, just because I believe in the ladder test does not mean I'm putting down your experience and knowledge. No Sir! If you ever write your procedure for reloading I'd love to read it and if you were to make a book with it I'd be the first one to buy it! Sure!!! I do respect and honor your accomplishments.
Jesus Christ the same yesterday, and to day, and for ever.
Our Lord Jesus said that as it was in the days of Noah and
also as it was in the days of Lot so it shall be in the days...
It's happening again!!! God sent to us His prophet, and His Word
to this generation and we once more are rejecting it as was prophesied!!! ---> As promised, God Sent His Prophet to us!
I'll pile on here and say I'd also appreciate a post covering your load-development-by-chronograph techniques. In my limited ladder test experiences, I have monitored and recorded velocities with my Oehler chrongraph. I've more or less concluded that a ladder test cluster that also coincides with several consecutive loads with similar velocity (little velocity gain per incremental powder charge increase) is a potentially good powder charge zone, worth further research. And that these two features coincide too often to be purely coincidental. I'm not sure this matches with your (or others) load development experiences or not. As a consequence, when running ladder tests, any clusters of incremental powder charges which yield limited velocity gains (velocity gains hesitate for several rounds before again increasing with each increased powder charge) get my full attention. I load additional cartridges in these powder charge zones while testing for accuracy, ES, and SD. As you have posted more than once, low ES and SD is mandatory for truly long range shooting in order to minmize vertical spread. So if good accuracy and precision can also be attained by developing loads with a chronograph, we kill two birds with one... bullet?