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omnimedic · November 3, 2013, 09:51 PM

fpchief-

Like you, I wanted to load a .223 subsonic, "just because". I consulted with a buddy who reloads and he gave me his formula: 4.5 grains of Trail Boss.

I loaded some up under a 65-grain Nosler, and the only sound you hear is the hammer striking the firing pin with a can. As I expected, they won't cycle the bolt.

Go over to the semi-auto forum to see how I'm going to experiment to solve this. It involves reducing the weight of the buffer and/or reducing the spring tension to match the reduced forces generated by a reduced load.

I'll post results of my experiment over there when I get them.

November 3, 2013, 09:51 PM	#11
omnimedic Junior Member Join Date: April 28, 2013 Posts: 14	.223 sub loads fpchief- Like you, I wanted to load a .223 subsonic, "just because". I consulted with a buddy who reloads and he gave me his formula: 4.5 grains of Trail Boss. I loaded some up under a 65-grain Nosler, and the only sound you hear is the hammer striking the firing pin with a can. As I expected, they won't cycle the bolt. Go over to the semi-auto forum to see how I'm going to experiment to solve this. It involves reducing the weight of the buffer and/or reducing the spring tension to match the reduced forces generated by a reduced load. I'll post results of my experiment over there when I get them.