Barrel steels are pretty soft, so the mandrel wouldn't need to be that hard.
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Barrel steels are pretty soft, so the mandrel wouldn't need to be that hard.
" Nil desperandum - Never Despair. That is a motto for you and me. All are not dead; and where there is a spark of patriotic fire, we will rekindle it. "
- Samuel Adams -
This is going to have most, if not all, of the info that you are looking for:
http://www.scribd.com/doc/53432034/N...Forged-Barrels
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"The body cannot go where the mind has not already been."
The first few paragraphs were indeed interesting. After that, that stupid site wants you to login with facebook, and then pay to read the rest of the article.
Still, the picture showed what I expected as far as the machinery involved, just nothing on the mandrel.....thanks though, good info.
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Funny, we were just talking about it, and here's a DD rep explaining the process.
https://www.youtube.com/watch?v=S4qE...ature=youtu.be
That's cool. I'd seen tiny clips of a hammer forge in action, but I didn't realize the blank actually gets stretched in the HF process. WOW! Very interesting.
"You people have too much time on your hands." - scottryan
Aside from Colt's testing that reached the conclusion that there was no advantage to hammer forged barrels, have there been other tests done?
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Only performance counts - Paul Sharp
I'm curious as well. I do own one CHF barrel that I got from BCM. I also happen to own a standard BCM barrel. Both are 16" light weights and I get better accuracy out of the CHF. I can put up 1.5 to 1.7 groups with the CHF but I can't break 2 inches with the standard. I know there are many other factors playing in here but that's all I can offer. Both barrels are free floated and I've shot close to 10 different rounds. I'm sure both barrels could be a bit more accurate in the hands of a better shooter.
I can't comment on life expectancy and probably never will be able too. There's no way I'll ever put more than 30,000 rounds through either of these barrels.
A mandrel is inserted into a blank which is deep hole drilled. The mandrel has a negative image of the rifling and chamber. As the hammers pound the outside of the barrel, the material deforms around the mandrel and creates the chamber, lands and grooves.
Any barrel production method is not without it downsides. With CHF'ing, there is a large amount of stress imparted on the barrel. Less important than the particular method is the way in which the barrel maker executes it. For high accuracy barrels, cut rifling is the way to go, but very time consuming. Button rifling can produce a barrel just as accurate as a cut rifled one, but in general terms the level of accuracy won't last as long.
All that being said, if you want a barrel you can hammer the f' out of, chrome lined hammer forged would be my choice. If I wanted to shoot bugholes as accurately as possible, cut rifled.
Last edited by bp7178; 06-17-14 at 22:13.
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