I tried a ladder test today with new 7 RUM. I was using Retumbo starting load at 88gr working up to 94 gr by .4 at a time.
Do you typically do this test at 300 yrds? Problem was that most the shots went into two groups with very little vertical spread. Here are the results:
It seems to me that 300 yards is stretching it for a ladder test (just my opinion). The goal is to determine the most accurate load and I feel that at that range, there are too many other variables present. I would shoot the ladder at 100 (what I've always done), pick a load, and then take it out to 300 and see what it does. Just my opinion.
I think shot 13 did not register. I was thinking shots 4,5,6 and 12,13,14. What would you suggest?
Thanks for your input!
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I agree, 4,5,6 and 12,13,14 Depending on what I was wanting out of the load, I'd either try a couple groups with #5 or #13 to see if one was near what I was looking for. If you are looking for a load around 3200fps, then try 3-4 rounds each side of #13 (.1gr per step) to figure out exactly where the node is. Then pick the most consistent part of the node for your load.
What bullet are you shooting?
If some is good and more is better, then too much is just right.
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