My brother has a 5.7 and is planning on getting a PS90. Anyhow he does not reload so he give me the brass. I have been thinking about making a Bolt action 5.7 for the fun of it. Might even neck it down to .17 for the sake of being really different. Can I just use a Sort action bolt group?

Thanks for the help!

My brother has a 5.7 and is planning on getting a PS90. Anyhow he does not reload so he give me the brass. I have been thinking about making a Bolt action 5.7 for the fun of it. Might even neck it down to .17 for the sake of being really different. Can I just use a S[h]ort action bolt group?

Thanks for the help!

This search (http://www.google.com/search?biw=996&hl=en&q=4.4x28) might help, although there's a fair number of "false positives" too. The brass (in either 5.7x28mm or 4.4x28mm) has a funky case head size and will almost certainly require a custom bolt.

That is what I've been fearing.....