Gunsmithing Blueprinting factory action

[want2Baccurate]

Hi all, I have a question I was hoping you guys could answer. How much of an accuracy gain can be expected at ranges inside 750 yards between a blueprinted action, and a factory action? I know that bearing surfaces, and how the bolt face mates to the casing will be impacted by blueprinting, but are we talking about noticeable improvements such as 1" tighter groups, or is this more important at long ranges like 1k?

 

[SnkBit]

Re: Blueprinting factory action

That's going to be a hard question to answer. It could be a lot, or it could be nothing. I would say it depends on how close the dimensions are now.

 

[Geno C.]

Re: Blueprinting factory action

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: SnkBit</div><div class="ubbcode-body">That's going to be a hard question to answer. It could be a lot, or it could be nothing. I would say it depends on how close the dimensions are now. </div></div>

+1! Sadly that about sums it up...

 

[x ring accuracy]

Re: Blueprinting factory action

Like comparing a Corvette to a Vega. If you don't know what a Vega is, nevermind.

 

[Geno C.]

Re: Blueprinting factory action

Hey now! My vega has run mid tens

 

[gamma]

Re: Blueprinting factory action

Its usually never money well spent, it gives varying degrees of improvement. If its for a hunting rifle I wouldnt bother but for something more serious like a long range varminter or target rig then maybe but as already mentioned by another poster it sometimes makes little difference.

 

[eddief]

Re: Blueprinting factory action

If you are not replacing the factory tube when truing up the action, then it would be a total waste of time and money IMHO.

If you are putting a new custom tube on, then having it trued up won't hurt anything. The main thing is the receiver face gets squared so you get a perfect mate between action face,lug, and barrel shoulder.

 

[Jkob]

Re: Blueprinting factory action

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: eddief</div><div class="ubbcode-body">If you are not replacing the factory tube when truing up the action, then it would be a total waste of time and money IMHO.

If you are putting a new custom tube on, then having it trued up won't hurt anything. The main thing is the receiver face gets squared so you get a perfect mate between action face,lug, and barrel shoulder. </div></div>

Bluepring an action does not stop at the receriver face. The recoil lug on most remingtons is itself mostly not flat and varies as much as .003" which would cause misalingment with the barrel shoulder; this would negate the squaring of the receiver face. Also, when doing a complete and not mediocre trueing up of the action, it would include the bolt nose, locking lugs recut, bolt face redone, recutting the receiver lug surfaces, single pointing the threads. and surface gringing the recoil lug or using an after market one that has been done.

Additionaly, if the trueing was done correctly, you Cannot use the original barrel as the threads will be too sloopy a fit.

There are too many guys out there that will not do a complete job but still insist they do.

To answer your original question, it would depend, as the above poster said, how true it was when you started. Mostly, I think it would help.

Jim

 

[DMann]

Re: Blueprinting factory action

Another factor to consider is that truing/blueprinting removes dimensional "slop" that can and often does affect performance. As has been said, if the factory rifle is pretty darn true from the outset, then improved performance may be very minimal. However, what you are accomplishing is removing potential problems and making the rifle more consistent. Basically, you are eliminating mechanical or built-in variables from the overall shooting equation, so lost accuracy or performance issues could be narrowed to ammo problems, scope issues, shooter fatigue or technique, etc., etc.

 

[eddief]

Re: Blueprinting factory action

<div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: gundoktr</div><div class="ubbcode-body"><div class="ubbcode-block"><div class="ubbcode-header">Originally Posted By: eddief</div><div class="ubbcode-body">If you are not replacing the factory tube when truing up the action, then it would be a total waste of time and money IMHO.

If you are putting a new custom tube on, then having it trued up won't hurt anything. The main thing is the receiver face gets squared so you get a perfect mate between action face,lug, and barrel shoulder. </div></div>

Bluepring an action does not stop at the receriver face. The recoil lug on most remingtons is itself mostly not flat and varies as much as .003" which would cause misalingment with the barrel shoulder; this would negate the squaring of the receiver face. Also, when doing a complete and not mediocre trueing up of the action, it would include the bolt nose, locking lugs recut, bolt face redone, recutting the receiver lug surfaces, single pointing the threads. and surface gringing the recoil lug or using an after market one that has been done.

Additionaly, if the trueing was done correctly, you Cannot use the original barrel as the threads will be too sloopy a fit.

There are too many guys out there that will not do a complete job but still insist they do.

To answer your original question, it would depend, as the above poster said, how true it was when you started. Mostly, I think it would help.

Jim </div></div>

I didn't mention, but assumed a aftermarket recoil lug or re-ground factory would be used, my fault. What I was stating, is what I feel is the most important part of it all and a minimum of what should be done to a factory action.

If you want to pay for the total polish of a turd, you will be money ahead to purchase a custom action that will hold MUCH better value, again MHO.

I'll bet you if you take two new Rem 700's and totally true up one (not blueprinting, wrong term) and on the other just face the receiver (re-ground lug), run identical custom barrels and everything else equal, you will not be able to tell the accuracy difference from a field (hunting) or tactical position.

Full blown Benchrest is different, plus 99.9% shoot custom actions anyways.

I am not taking anything away from a total single pointed true job. Just stating that you don't need to go all out balls to the wall to get great accuracy.

What's the last thing your bullet sees....the barrel, hence it being the most important part.. Let the flames and snake oil continue!

 

[x ring accuracy]

Re: Blueprinting factory action

To clarify my original point and as others said. If you true a factory action, it would go without saying a new recoil lug and barrel along with the bedding / floating / trigger / stock etc. With that being done it does run with the custom actions. Would you put a Stiller in a factory stock with a fac trigger? I think not. So compare apples to apples with the same components, they do work. Sorry Jerry, you know I love your products, just sayin' : )