Sorry, that was my load for my 22-250.(3730fps)
The 22-250 Ai was 38gr of adi2208 with 60 gr hornady flat base hollow point.
The tube was 26" long.
I suggest you step back two or three grains and try from there.
2208 and h-380 are my two powders of choice for that the 22-250.
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