Tofan

Deductive reasoning tells me it's Pacific tool, but there are more companies that make headspace gauges.

Yeah I am going to give Pacific Tool a call monday about this. I will just end up making barrels, no point to sit around and wait for somebody else to do it. Also have a master plan, especially now that I have the brass on hand. Pretty nice little round.

MarkGrant69, I sent you a private message about this rifle, let me know if you are still trying to get rid of it. Thanks. Matt

No worries, I appreciate what you did offer. I am going to use the pictures I can find, along with an actual receiver. I just got some brass in, going to be looking for reloading dies, and I will be reaching out to pick up chamber reamers to make some barrels I believe.

If you can take another picture of the 5.7 up closer and more light to see the rest of the "grooves". I will use the known distance of the primer to draw the "rough" specifications. Interesting to say the least though. Understand about the dimensions, but sometimes all you have to go off of are pictures with other things that you can measure and make drawings off that. A little bit harder way to do it, and probably impossible to perfect, but definitely get really close.

Can we not just have somebody here who has a "factory one" take a picture? Surely this can be reproduced easily, if you have a pic of the feed ramp I would love to see it.