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a new rifle

 
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  #1  
Old 02-28-2004, 09:54 PM
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Join Date: Feb 2004
Location: wisconsin
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a new rifle

does anyone make an action thats blueprinted out of the box? my current plans are 700 action blueprinted, mcmillan a4 or a5 shillon barrel 300 rum(can you improve it by fire forming?) with a nightforce 5.5-22 nxs r2,180 or 190 mk my goal is to get 100 to 1000 yd with 1/2 to 3/4 moa
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  #2  
Old 02-28-2004, 11:39 PM
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Re: a new rifle

Ok, I am going to make myself into a complete fool here but I have to ask. What is blueprinting an action? Is it simply that action's diagram with all the pertanent information on it? I remember back in the Hot Rod days the big thing was a blueprinted and Balanced motor. Well the balancing helped but blueprinting was just mearly for information but alot of guys made it out to be something that gained you horse power and it didnt do a dang thing for ya. Unless your tearing your motor apart and replacing one component that needs to match another exactly.
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  #3  
Old 02-29-2004, 02:53 AM
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Re: a new rifle

What about the 40X? Imagine that several gunsmiths can blueprint an action for you.
Sako7STW-There is no dumb question! Its just like blueprinting an engine. How many of them engines, do you think had way too much material on them? Or holes not cut exactly like they should. High performance motors are blueprinted, tolerances are tighter. You take the specs, or "blue-prints", and cut the action to match exacly to where everything is supposed to be. Remember, when things come down an assembly line, tools get dull, and "off" a little.

[ 02-29-2004: Message edited by: littletoes ]
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  #4  
Old 02-29-2004, 08:02 AM
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Re: a new rifle

OK.. I'll put my butt on the line here...

I have often wondered what blueprinting was.. to be honest I never really new but over the years and hearing guys talk about it I just came to the conclusion they were talking in terms of how a smith would "true" that action.. ie" lugs lapped, bolt face squared, action square to the barrel etc. etc. etc. when that whole process is complete the action is then " blue printed" I could be wrong but over the years and hearong guys talk about it.. I have assumed thats what they meant...

To answer the questions...

I think the only way you get a " blue printed" action outta the box is to go through a custom chop ie : Rem 40X or the Win shops.. but honestly if you trying to save money to get into the LR game and trying to do it cheap...

Buy a used LR rig from someone... or just wait and save your money.. it took me 2 years to save for my first LR/custom rig!

You could always go the Sendero route and get the action trued.. but thats pretty pointless without a custom barrel...
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  #5  
Old 02-29-2004, 09:35 AM
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Re: a new rifle

Blueprinting the action means to make it square and eliminate the runout from the bolt axis. The rear surface of the lugs are trued square to the bolt, then the bearing surface in the action is trued to the bolt bore. The front of the action is cut square to the bolt bore, and the barrel threads are recut so that they are concentric to the bolt bore (only if a custom barrel is being added). If stock barrel is being used, the barrel shoulder will be recut to true it square to the bore axis. They can go as far as to ream the bolt bore on the action (it may be out of round and have a tapered hole) and then sleeve the bolt. Depends on how much money you have to spend. Your trying to eliminate tolerance stack-up and make everything dead nuts true. Say the front of the action is .004" out of square, the barrel shoulder is .004" out also. They might cancel each other out, then again, think of where the barrel is pointing if the index if at worst case (.008"). Hope this helps [img]images/icons/shocked.gif[/img]
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  #6  
Old 02-29-2004, 11:45 AM
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Join Date: May 2001
Location: Sask. Canada
Posts: 2,410
Re: a new rifle

AJ gave a very good description of action work. George Gardner explained it to me as imagining that there is a perfectly straight line going through the exact center of the receiver, bolt and barrel. Everything is made as parallel or square to that line as possible. Then some of the other necessary "truenesses" are established. Hope that gives another bit of light on the process (also hope it is correct [img]images/icons/wink.gif[/img] )
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  #7  
Old 02-29-2004, 08:45 PM
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Join Date: May 2001
Location: Urich, MO
Posts: 838
Re: a new rifle

You all are right and wrong at the same time. You are right in the description of true-ing up an action.
However if it was blueprinted as alot of 'smith's call it, the action would be trued to certain specs as set by a blueprint.
Car engines are blueprinted, that's why I can take the heads off a 76 Chevy 350 and put them on a 80ish 350. But since actions are not blueprinted you can't swap barrels without re-headspacing them. Make sense?
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