Sorry if this has been covered before; I've done a search and found nothing.
I'm getting ready for Red stalking in the Highlands, and checking a couple of factory loads for my Sako 85 Finnlight in 6.5 x 55mm.
I borrowed a Shooting Chrony F1 at the range on Sunday, and checked two loads for MV.
The barrel is standard length; the rifle is fitted with an ASE North Star mod. The chrono was about 10' from the muzzle. I warmed the barrel with five rounds of FNM FMJ before testing the hunting loads. Results?
Prvi Partizan 139 grain SP:
6.5 Federal Power-Shok 140s:
Doubting the numbers on the Prvi round I emailed my shooting pal in the Highlands, who uses mainly this Prvi load. He tested an initial batch years ago, found the MV to be about 2,700 fps, and has been happily using it ever since. He's grassed over 1,000 deer with this load through his Sako 75.
He set up his chrono, tested the most recent batch in his gun safe, and confirmed the MV figures I had measured on Sunday.
So, through a 22 7/16” barrel, neither round meets the minimum 2,450 fps MV to make it deer-legal.