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I've got to a point with this build that I need some guidance in choosing the proper gas port diameter. Here's what I'm building. 224V 28in X-Caliber with +2" gas system i ordered the barrel and omited the gas port option. Working the kinks out of this build has been a learning experience...

I'm building one and wanted to see if anyone else has done this. Mine will have a 28" X-Caliber. I handload and have had good luck with my cousins 20" and this is just something to see what would happen with velocity.

I have recent build in 224 Valkyrie using a Sanders Armory side charging handle upper and a X-Caliber barrel. There is no gas in this build. Working the bolt back and forth, loading and extracting dummy rounds is fine. However, I can't extract a fired case by hand. I don't have headspace gauges...

Loaded some 175smk with the with 10g of trailboss. To make a long story short these are still supersonic...about 1565fps. From my calculations. In have a 100 yard zero with 175 FGMM...according to my shooter app that has a velocity of 2380fps at 100yds. My subsonic impacts were 12" low. I...