Muddslinger48
FNG
- Joined
- Jun 12, 2022
- Messages
- 35
I bought 200 rounds of 77tmk 556 Black hills a couple months back. I noticed this batch does not have the primers crimped. I decided to chronograph the new batch and see how it stacked up to the older Lot. I was surprised to see that this new batch chronographed around 100fps slower than the old stuff? Has anyone else noticed this?
