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velocity spread

did some testing today.
7mm-08, 48.5 gr rl19, 162 gr sst, win primers

first shot went 2660 then 2666 then 2689 then it hung around
2710 - 2730 with one going 2760.
Wass going on.
Will the very first shot always be low and rise on a warm barrell
I didnt leave the ammo in it and let it cool down but of course it was warm but not hot.
I dont remeber if it was off a clean barrell, I dont remeber if I cleaned it last time, i think not.
 

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