lysanderxiii well done and many thanks.
I no longer have access to many of my detailed ME design material.
Working over wide temperature ranges at tight tolerances has always been a bit of a nightmare.
I was looking at my small spray set last night.
A lot of aluminum parts in there.
Blue chemicals tend to eat at aluminum pretty badly.
If you really want to try spraying, you may well need to replace parts in your spray gun with steel.
Probably a higher nickel type of Stainless.
There are vanishingly few "dumb questions" when screwing around with 50,000+ PSI chamber pressures.
Gins often used carefully optimized screw pitches to go with hardened screws.
For many years chamber pressures where measured using lead and copper 'crush' cylinders.
The LUP (Lead Units of...
Green is usually copper corrosion.
Bullet jackets (AKA 'gilding metal') are NOT the exact same materiel as brass cases.
There is significantly more copper in the bullet jackets.
The slightest moisture (or other corrosive material) will create a primitive battery with
tiny amounts of current...
That claim is as real then as it is now.
Forging alters the crystal structure of metal and the boundaries in the metal.
It makes it significantly stronger in one direction at a slight loss typically at 90 degrees to the crystal structure.
It is the goal of forging steel (and a few other metals)...
Minor changes in Temp Co (Temperature coefficient of expansion) show up in larger objects at higher temperatures, or in smaller objects that may have a significant temperature difference.
It is what makes a typical mechanical thermostat work.
Two different metals (often copper and steel) are...
Not really.
You use a degaussing coil and move it back and forth while slowly increasing the distance to the magnetized object.
A plastic tray works well here.
90% and 110% are 'popular' boundaries for transonic.
Once any portion gets close to transonic the Bernoulli Equations simply fail.
A 'standing pressure wave' can exist and for the most part their is no air flow past that pressure wave.
The wave is not 'standing' in the sense of not moving, it...
I have some antiques that if you can find ammunition it is VERY expensive.
Like .50-70 government.
Usually well over $2 a shot.
I also have a Panda switch barrel varmint rifle.
It is extremely accurate, but does require neck turning every case.
I sort cases by neck wall run out measured before...
Stanley Hand Tools 10-499 Retractable Blade Quick-Change.
There are three or four scattered around my shop.
Handle holds at least four blades.
Push the blade all they way forward and hold down the yellow button.
Blade releases and is easily revered to the other end or replaced with a new blade...
For final honing I have mostly switched to diamond coated steel plates.
Never an issue with stone hardness vs the metal you are working with.
After use just wash them off and allow to dry.
A little oil will make sure rust does not start.
In many cases they are not made from steel.
That alone will tend to limit useful lifetime.
Think of all those 'pot metal' (often cast zinc) frames
(or even plastic) holding a steel barrel.
Nothing wrong with a thin steel washer to set headspace correctly.
My 1866 looks like it was exported, never used, and then imported back into the US.
The rifling is perfect and it is very accurate.
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