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Message: <blockquote data-quote="tulsacrittergetter" data-source="post: 3039747" data-attributes="member: 41264">Okay, so a friend of mine asked me to help him with his form-1 can, so I agreed. I talked him into using the exact same parts that I used to build mine, because I wanted to try a different baffle spacing configuration on the first 4 baffles. I increased the spacing between cones 1-2, 2-3, and 3-4 and made the spacing between cones 4-5 and 5-6 shorter, and then opened up the last spacer between the last baffle and end cap, and it fixed the problem. We compared his can against mine because they are exactly the same, and on his can, every subsonic round we put through his can stayed subsonic. I believe it is because of the additional spacing between the first few cones, and it allowed for more gas expansion closer to the muzzle. It also eliminated nearly all of the blowback from the can...I'm sure there was some, but neither of us could tell if there was any, which was a nice change. His can was a lot quieter, and was comfortable to the shooter's ear on .223 supers all the way up to .308 supers, which is what it was built for (.30 caliber can, meant for .223/5.56, 300 Blackout, and 308WIN). I guess I'm just going to make my form-1 can a dedicated 223/5.56 can and when my next round of stamps come in, I'm going to duplicate my friend's configuration and build one just like his.</blockquote>