Re: Load Development: Ladder Test
I used a sheet of poster board 28"X22" which works out to 20 equal squares 5.6"X5.5". This is more than adequate if your rifle shoots MOA or better, and would also work great for pistol load ladder test development at 30 yds or so.
Notice on the sheet that it appears the rifle would shoot just about any load within the data range acceptably. It is afterall a very accurate rifle. But look at shots 14-18, and notice all 5 of those fired at the same target would have clustered into a nice sub 3/4 inch group at 200 yds. That gives me a sweet spot in the load data from 46.5 gr to 47.3 gr of Alliant 2000MR. Which is a pretty broad sweet spot. Deciphering this data is simple. You take that spread and load the charge in the middle of it, that gives you an ideal charge weight that allows variances both above and below to group along with it. According to this ladder test my rifles ideal load with this combination of components is 46.9 gr 2000MR. I am going to load the remaining 29 pieces of new brass with that 46.9 gr and go shoot some groups at 200. If the test told the tale correctly I should get at least 3/4" groups at 200 with it.
It takes 43 muscles to frown, 17 to smile, and 3 for proper trigger squeeze.
The latest caliber or gear is no substitute for experience and skill. Rifles and cartridges don't make hits -- shooters do.
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Last edited by JLA; 10-24-2011 at 04:15 PM..