Re: ladder test? does it work
In a nutshell, the scientific method is the method often described in precision shooting magazine. I alter it very little from how they do it.
Also in a nutshell, it is run by picking a bullet, picking a powder or two, loading 3 shots of each charge and incrementally going up in powder charge by .3 or .5 grain from a mid point to a point where the pressure signs show up while watching for Sd nodes and group sizes. Once a good sd is found that shows good accuracy and group shape/size, it is repeated at short range and then long range.
This method shows the upper node and lower node quite well as well as seeing how fast your gun will push a bullet past the upper node (this is not entirely safe and should only be done carefully and is not all that important because once you reach the upper node, the gun usually won't shoot good past this point anyway but it is interesting to see).
Remember, this is the condensed nutshell version but you get the point.
If you are honestly (and I have always trusted you [img]/ubbthreads/images/graemlins/wink.gif[/img]) only taking 30 shots to run and re-run a ladder then I will flat out admit that the scientific method may not be faster. It usually takes me between 20 and 50 shots to tell when a powder is not going to cut the mustard and another one must be tried.
Scientific method was not named by me by the way. It probably has many different names but that is the first one I heard and makes the most sense to me. No matter what we call it, it sounds like the tail end of your loading procedure incorporates it anyway. Once the charge has been identified by running your ladder, you say you fine tune it by using standard accuracy loading techiniques. Are you shooting 3 shot or 5 shot groups of one charge to see group size and shape by doing this? If so, you are using the basic same method I use. You just fired one shot of each charge from the top to the bottom of pressure nodes to get the sweet spot. I did the same thing basically but I fired three shots instead while looking for group size and similiar impact areas on target.
Does any of that make any sense at all? [img]/ubbthreads/images/graemlins/frown.gif[/img]
If it's not far, it's boring.