Is bolt-action receiver blueprinting still a common thing?

[AlNyhus]

Interesting story....a local shooter wanted to see the bullet making process so he stopped over and I walked him through it. He told me had a better mic than my Mitutoyos...a $30 digital that had lots of places after the decimal point. So he brings it by next day. It's 'made' by Klik-Klak Tool And Fireworks company...something like that.

Using my ground standard, his 'wonder tool' was .0004 off. Checked it again and it was .0006 off. Once more and it was .0005 off.

Good shootin'. -Al

 

[LVLAaron]

Interesting story....a local shooter wanted to see the bullet making process so he stopped over and I walked him through it. He told me had a better mic than my Mitutoyos...a $30 digital that had lots of places after the decimal point. So he brings it by next day. It's 'made' by Klik-Klak Tool And Fireworks company...something like that.

Using a ground standard, his 'wonder tool' was .0004 off. Checked it again and it was .0006 off. Once more and it was .0005 off.

Good shootin'. -Al

HA!!! Less than a thou off, for something from Klik-Klak Tool And Fireworks company is pretty good

 

[SKWERLZ]

And hey! Look at this 50+ yo Starrett. Right on the money!
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Those older starrett’s are excellent

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These mics are worth every penny. I know, digital... but damn they're nice.

Actually for the resolution’s they are capable of price is pretty reasonable

 

[WSnyder]

Actually for the resolution’s they are capable of price is pretty reasonable

Like the Mitutoyo digital calipers one of my favorite features is to be able to pre set a target dimension and work towards zero. That way you have a direct number of how far you have to go rather than having to do math (with the added potential to screw it up) to hit your dimension.

Those older starrett’s aren’t excellent

Aren’t or are excellent??? That tool was given to me ~43 years ago and it was far from new when it was. Used but not abused. I have another that was given to me at the same time without a ratchet and without a tenths vernier. Both are used as my shop universal do it all’s for general measurements. The digital’s get used a fair bit but less often.

Does that mic really read 5 places? Is the resolution 1 or 5? Bad ass if it does either.

Yes it does. Resolution of 0.00005” on the last digit. Accuracy of +-0.00005”. Far beyond what we need.

 

[LVLAaron]

Here it is, zeroed and cleaned with paper.


Black sharpie on both sides of the standard.


Standard cleaned and wiped with paper

 

[Old Navy]

With good tools and a developed technique, measuring to .0001 (one tenth of a thou.) is a walk in the park for a trained craftsman or real machinist.

Heck, I'm neither. Measuring to the .0001 is a normal step in my bullet making program. Not much of a hill for even an average climber.

Maybe in a climatized room and if you didn't hold the tool in your hot little hand very long.

 

[Old Navy]

Most things we do in rifle building do not require you to measure to a tenth of exact size. We do more comparative measurements. With that in mind. .0001 is do able.

Exactly and all conditions in the shop being near the same every day.

 

[ImBIllT]

I don't think they shoot better. Unless the action was a total piece of crap, maybe you could see it. Then if that's the case, sell it.

For example, no one has ever proven that "squaring" a Rem action makes it shoot better. In fact, to me, it causes more issues than it fixes. When I question this theory, and state the obvious that I've NEVER seen a test for this showing improvement, I'm often beaten down about how squaring is an "obvious" improvement and doesn't need to be proven.

There is a trend in these discussions.

I’ve never had a Remington action trued, and although it’s been nearly a decade since I shot in a match, I beat plenty of guys shooting custom actions. Is a custom action “better” than a stock 700? Definitely. Does it shoot better? Maybe. Does a trued 700 shoot better? Maybe. Is a trued 700 as “good” as a custom? Definitely not, even if they might capable of equal accuracy.

I’m with you. I’m in no way convinced that truing a Remington action will result in increased accuracy to a level that can be proven, at least not by most people.

 

[ImBIllT]

I'm not disagreeing. You wanted proof that it makes a difference. I'm offering it.

If someone showed up with a walmart Rem 700 SPS and said "make me a match winning FTR rifle" I'd decline it.

If someone showed up with an old and loved hunting rifle with rusty threads and a pitted face.... is it not worth cleaning up? If it makes the customer happy, looks nice and feels nice... what's wrong with that?

Maybe I got lucky, but these are from a Walmart SPS, with a Krieger barrel and McMillan stock.

Primary extraction required work.

 

[BoydAllen]

I’ve never had a Remington action trued, and although it’s been nearly a decade since I shot in a match, I beat plenty of guys shooting custom actions. Is a custom action “better” than a stock 700? Definitely. Does it shoot better? Maybe. Does a trued 700 shoot better? Maybe. Is a trued 700 as “good” as a custom? Definitely not, even if they might capable of equal accuracy.

I’m with you. I’m in no way convinced that truing a Remington action will result in increased accuracy to a level that can be proven, at least not by most people.

Go back and reread my post about my friend's action. Everything in it was factual. For a fellow who has no personal experience with the before and after of a trued action.....

 

[59FLH]

Here it is, zeroed and cleaned with paper.
View attachment 1450156

Black sharpie on both sides of the standard.
View attachment 1450158

Standard cleaned and wiped with paper
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Here it is, zeroed and cleaned with paper.
View attachment 1450156

Black sharpie on both sides of the standard.
View attachment 1450158

Standard cleaned and wiped with paper
View attachment 1450159

Impressive, thanks for taking the time.

 

[LVLAaron]

No prob. The QuantuMike's really are amazing.

 

[GenePoole]

They seem amazingly precise, but are they accurate?

The fact that you don't disclose anything about the temperature nor storage conditions of your standards as well as NIST traceability and calibration information speaks volumes.

 

[Dimner]

They seem amazingly precise, but are they accurate?

The fact that you don't disclose anything about the temperature nor storage conditions of your standards as well as NIST traceability and calibration information speaks volumes.

Uhhh. It does?

 

[GenePoole]

The shop I used to work at had its own metrology lab. I've seen instruments that could measure to 10 millionths. These were permanently fixed to 20 tonnes of granite and in an insulated temperature and humidity controlled room that you had to wear a Tyvek suit just to enter. The standards for these instruments were platinum-iridium bars certified by NIST and locked in a dry nitrogen case. When I hear a claim that a person in his or her garage with a mic bought off the internet can measure to 50 millionths, I'm skeptical.

 

[SKWERLZ]

Like the Mitutoyo digital calipers one of my favorite features is to be able to pre set a target dimension and work towards zero. That way you have a direct number of how far you have to go rather than having to do math (with the added potential to screw it up) to hit your dimension.


Aren’t or are excellent??? That tool was given to me ~43 years ago and it was far from new when it was. Used but not abused. I have another that was given to me at the same time without a ratchet and without a tenths vernier. Both are used as my shop universal do it all’s for general measurements. The digital’s get used a fair bit but less often.


Yes it does. Resolution of 0.00005” on the last digit. Accuracy of +-0.00005”. Far beyond what we need.

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Sorry
Are is what a intended to say.

 

[LVLAaron]

They can measure repeatably to a tenth... I think that's more than one could ask for, for the cost and availability. To do better than that, You need to be working in a clean room or under a hood.

 

[Old Navy]

The shop I used to work at had its own metrology lab. I've seen instruments that could measure to 10 millionths. These were permanently fixed to 20 tonnes of granite and in an insulated temperature and humidity controlled room that you had to wear a Tyvek suit just to enter. The standards for these instruments were platinum-iridium bars certified by NIST and locked in a dry nitrogen case. When I hear a claim that a person in his or her garage with a mic bought off the internet can measure to 50 millionths, I'm skeptical.

We also had our own lab. If my maintenance guys had to enter, they had to clean up big time after they left. We had a very large machine shop on site that built parts for various rocket motors that we also built on site. The tool crib stored some of the critical measuring tools also. They were treated delicately to put it mildly.

 

[Jesswil61]

We also had our own lab. If my maintenance guys had to enter, they had to clean up big time after they left. We had a very large machine shop on site that built parts for various rocket motors that we also built on site. The tool crib stored some of the critical measuring tools also. They were treated delicately to put it mildly.

Been there done that, "Clean Room" temperature & access control, even had to let the room stabilize after entering before calibrating.