At the recent Vickers class we discovered a possible new data point concerning 12.5" barrel 5.45x39mm platforms and Wolf 60 gr FMJ ammo - my weapon was KH'ing some of this stuff, noticed on TD2.
The 16.25" AK-74M clone seemed to shoot it fine, and the 12.5" seemed to run with the Bulgy 53 gr. I need to conduct more testing to see if this hypothesis is valid. Even then, it is only valid for my rifle until we can gather additional data.
I have been subsequently informed that the Russians came up with different twist rates for these platforms, much like we did in 5.56mm.
However, I pulled bullets from both cartidges - they were both exactly the same length.
Any thoughts?
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