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Old September 17, 2021, 02:35 PM   #1
Pistoler0
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Join Date: November 15, 2019
Location: Conifer, CO
Posts: 576
How accurate are ammo manufacturer's claimed MV numbers?

I don't have access to a chronometer, and I am trying to develop DOPE for my 308 bolt action. I have about 500 rds of SMK loaded ammo (Bullets 1st) which is accurate and affordable. They quoted velocity out of an 18" AR-10 barrel which is difficult to extrapolate to my 26" bolt action barrel.

I am also trying to devise a drop chart for an AR-47 that I mostly feed with Tula.

In your experience, how accurate are ammo manufacturer's claimed MV numbers?

I suppose this vary by manufacturer, and in that case I would appreciate your experience with the factory ammo that you are familiar with.
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