Has anyone chronographed recent 2024 lots of Black Hills 77 gr TMK?

LimeSpoon

FNG
Joined
Nov 25, 2020
Messages
23
Re: OP Question

I've clocked previous lots of 77 gr TMK from around 2020 at about 2700 FPS from a 16" barrel, consistent across rounds from 2 lots, in 2 different rifles, through 2 different chronographs. This has roughly matched ElPollo's data from 2024 as well as Molon's from 2023.

Recently however 2 separate people have found velocities noticeably higher than expected, at 2741 FPS from a 16" barrel and 2507 FPS out of an 11.5", in both cases using Garmin C1s. This more closely matches measurements from my ballistic gel testing in 2019 where a 16" barrel pushed them at ~2740 FPS and a 24" barrel was reading about 2940.

Does anyone have their own independent data to share? I'd try it myself but I don't currently have access to a (functional) chronograph these days.
 
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