King of the Grendel round count

[VASCAR2]

I have two 12” 6.5 Grendel barrels and I’d be surprised if the 12.5” produced 25 FPS more velocity than a 12”. The biggest issue right now is finding anything to buy. I think the intended use should determine length of the barrel. I could live with 12.5” but I bought a 12” PSA to test the waters then bought a 12” Monster barrel with 1:7.5 twist which I really like.

For my environment the 12” is a good fit for how I use my 12”.