Quote:
Originally Posted by Alleycat
Wrong. Guys just got a small port and loaded short. Just like the Blackout. Model-1 sales guns all needed 1680 because of this. It was also common to throat them out because it was chambered in the 30-221.
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True some guys set up their guns like that, and used A1680, but others did large port and could not shoot full power ammo. With Remington making subsonic ammo, Noveske changed their port to be compatible with the new ammo, and dozens of makers standardized on this configuration.
As for loading short - that is no longer needed. I got Sierra, Barnes, and Remington to make new bullets designed for 300 BLK and meant to be loaded to full mag length.