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PBratton wrote:

The Annoyed Man wrote:

LSUTiger wrote:Before he worked for Brownells, he worked for Federal at Lake City, and he said that he sometimes fired as much as 15,000 rounds in a day during testing (using more than one weapon). He sounded like he knew what he was talking about.

I WANT that job! How much did he have to pay Federal for it?

I know, huh?

LSUTiger wrote:I will shoot primarily the 55 gr xm193 and 62 gr M855 stuff but want to be able to shoot higher weight ammo if needed.

I've only ever had 1:9 barrels. I'd like to get a 1:7, but mostly because I want a chrome lined barrel, and they all seem to be 1:7 these days. Now, I had a long conversation the other day with one of the "Ask the Experts" guys at Brownells, and AR barrel twist was one of the topics. He told me that the only reason the U.S. military uses 1:7 barrels these days is because they stabilize tracer ammo well, but that virtually ALL NATO partners are using 1:9 barrels in their 5.56 NATO chambered weapons. 1:9 will stabilize anything from about 55 to around 68-69 match bullets very well, including the 62 grain 855 penetrator. So unless you plan to shoot a lot of 77 grain SMKs, there isn't a whole lot of ballistic reason to need that twist rate for a carbine length barrel. That doesn't mean that it's a bad idea, but it might be a little oversold. The guy I was talking to had 1:8 twists in his personal AR barrels.

Before he worked for Brownells, he worked for Federal at Lake City, and he said that he sometimes fired as much as 15,000 rounds in a day during testing (using more than one weapon). He sounded like he knew what he was talking about.