I shoot a lot and use 1680 and my brass and rifle are REALLY dirty. Feeding and extraction become harder the more I shoot, the mags and brass are just a mess. I do clean my rifles after every shoot but I have to scrub it after using 1680.
I just hate the clean up.
I shot Viht 110 today using 16 to 16.5 grains of powder per Sierra reloading data and my rifle functioned but would not lock the bolt to the rear using 125gr speer TNTs. Accuracy was good but not great yet. I still have some room to play. Rifle, bolt, and brass...a lot cleaner..
My gas block is full length, standard gas tube with adjustable set screw full open. May try 4227 just for General purpose, just didn't want to spend funds on it if it's dirty like 1680. Thanks to everyone that responed...!!!
