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270 win build

 
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  #15  
Old 01-22-2014, 10:30 PM
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Join Date: Dec 2008
Location: Great Falls, MT
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Re: 270 win build

Quote:
Originally Posted by Trever View Post
Thanks everyone. Like I said " this is my first " so I am wanting to not have any regrets a year or two later. The 30" barrel is long. But the throat is the first to go right. Once it is burnt I could re chamber and have a nice barrel and a new throat correct? This gun is gonna be seem pretty long, as I am only 5'6 when I wake up.
There's nothing wrong with 5'6" guys like us with long barrels! I also shoot a Marlin 120XR 12G shotgun with a 40" barrel.

C&P from Lilja Barrels website ...

Almost all of the caliber and twist combinations in the rifle barrels we make are available with 6 lands and grooves. A few years ago we started to make barrels in a 3 groove configuration too at the request of some varmint hunters who were looking for longer barrel life. They were chambering barrels for hot 22 caliber varmint rounds and shooting the throats out of conventional 6 groove barrels fairly fast. We reasoned that if we reduced the number of grooves to 3 but kept the ratio of land to groove width the same (ie. the lands are twice as wide in a 3 groove barrel as compared to a 6 groove) that there would be more land area to resist heat erosion.

Well, it turned out that barrel life did increase and that accuracy stayed at least the equal of comparable 6 groove barrels. It is hard to put a percentage increase on barrel life but a conservative estimate might be 20%.

Benchrest shooters are always experimenting and looking for a competitive edge. Before long a few shooters, including Dan Lilja, were putting 3 groove barrels in 6PPC and 22 Waldog on their light varmint and heavy varmint class benchrest rifles. And these barrels proved to be very accurate. They started winning benchrest matches and soon became popular among the benchrest shooters. .

And we found that as a side benefit the 3 groove barrels seemed to foul very little and clean up quickly. We attributed this to the reduced number of corners inside collecting powder and copper fouling.

This answer to 3 groove - 6 groove question is not meant to discredit the 6 groove barrels. They have consistently shoot extremely well over the years. Dan continues to shoot both 6 and 3 groove barrels on his benchrest rifles. But if you haven't tried a 3 groove you might consider one the next time you need a barrel. We do not offer them in all of our caliber and twist combinations. Our page with caliber and twist listings indicates if a 3 groove barrel is available. And we are frequently adding 3 groove buttons to our offerings. If you don't see that a 3 groove version is offered in the caliber and twist you're looking for, ask, we might soon be making it.
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  #16  
Old 01-22-2014, 10:58 PM
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Join Date: Nov 2008
Location: SW Montana
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Re: 270 win build

I have not found setting back a barrel worth it, you need to plan so much extra length to get into the better lands and you don't get the same life you will with the first chamber yet you've shanked even more into the barrel to pull just a little more life from it hoping the same load hooks up, I gave up on it and just took care of my throat to maximize the accurate life and been much happier.

A barrel 26in to 28in is perfect for this kinda of case. The three groove barrels have not impressed me as much through their life, I've gone to the 5R and been soooo much happier and much less jacket fatigue.
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  #17  
Old 01-23-2014, 05:21 AM
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Join Date: Jul 2010
Posts: 94
Re: 270 win build

I am in...I got the barrel ordered from Hart. Just a magnum taper for a Rem 700.

I am new to reloading-2009. My interest is peaked in this 270 AI. I heard the Sherman, but I am not that much of a tinkerer so I think I will let that one rest.

Do I just tell the gunsmith to cut the chamber to 270 AI?
What about fire forming? I have quite a few loads for the rifle as it sits, do I just shoot those to form the AI necks?
Do they make AI dies or do you have to order custom dies?

Help, I want to squeeze as much out of this as possible, but not sure the juice is worth it.

Shane
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  #18  
Old 01-23-2014, 06:16 AM
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Join Date: Aug 2012
Location: Central Mississippi
Posts: 184
Re: 270 win build

I had originally wanted 5r rifling. I didn't plan on getting the same life after the the cut back but it would suffice quite nicely (in theory) while waiting on a new barrel. What die set will I need if I go the Ackley route?


I have a browning bps special steel 10ga that is pretty large. But, once I get tired of carrying it I can prop up on it like DOT does with shovels.
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  #19  
Old 01-23-2014, 06:48 AM
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Location: Great Falls, MT
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Re: 270 win build

I have a ...
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  #20  
Old 01-23-2014, 07:42 AM
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Join Date: Aug 2012
Location: Central Mississippi
Posts: 184
Re: 270 win build

Thanks. Being I want to shoot vld's, what length throat should I have?
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  #21  
Old 01-23-2014, 11:28 AM
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Join Date: Oct 2008
Location: Alabama
Posts: 5,551
Re: 270 win build

Quote:
Originally Posted by Trever View Post
Thanks. Being I want to shoot vld's, what length throat should I have?
I have never used a special throated chamber to shoot Bergers before, so just out of curiosity, I asked my smith his thoughts on people using specially throated reamers and stuff, because he shoots alot of Bergers, too.

And he said, "You've been watching YouTube and reading on the internet too much...Standard throat is perfectly fine, nothing special has to be done to shoot Bergers in a regular rifle. The benchrest guys do it because they seat them WAY out there because they have little cases and long bullets."

And he was 100% right. My 7RM he just finished building for me LOVES the Berger 168 VLD's and he used a standard reamer.
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