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to do some experimentation on this issue.

It would be interesting to see if you can repeat the effect a second time. And, if you can, then it would be interesting to see if you can get rid of the "transition" shots by cleaning the barrel between loads with the different powders.

In other words, if you start with Benchmark and a clean bore, where do the shots hit, sequentially? Is the first one out of a clean bore in the same group as the rest, or do they start somewhere else and "walk" to the final point of impact?

Same question for 748, starting with a clean bore.

Then, starting with a bore fouled by Benchmark, do you see that the first shot with 748 hit in the same group as the Benchmark, or in the same place that a first shot with a clean bore lands with 748, or somewhere else? And, do they "walk" the same way as the 748 residue replaces the Benchmark residue (compared to the way they "walked" when starting with a clean bore)?

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