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The Rem bolt head is copper brazed to the bolt body at about 2000° F. Then the bolt assembly is heat- treated. The tempering temp is approx. 900° F . (based on the hardness of the finished bolt) So, heating up to 900° will have no effect on the bolt hardness. RWO

I have never seen a Weaver style ring that would not fit a Picatinny base, but I guess it is possible with sloppy enough tolerances. http://www.brownells.com/.aspx/lid=10724/guntechdetail/Picatinny_Rails__Weaver_Rails__What_s_The_Difference_ RWO

The last set of Burris ZEE rings I bought had oversized tapped holes for the base clamp screws. This made the 6-40 threads very shallow to the point that they stripped with only moderate torque. I drilled out the holes and tapped for an 8-32 x1" SHCS. This gives good clamping force and...

http://www.bbssystem.com/manuals/bridgeport-manual.pdf

Duplicolor still offers acrylic lacquer, both in aerosol and cans. They have candies, metallics, and nearly any solid color you could ever want. Owned by Sherwin-Williams. http://www.duplicolor.com/products/ RWO

I read somewhere that the stainless blackeners work by oxidizing the surface chrome to chrome sulfate. If so, it stands to reason that acid passivation to remove most of the surface iron would expose more chrome and less iron, thus obtaining a darker color. Abrasive blasting might work by...

Started with dial calipers 4O years ago and switched to a Mitutoyo digital about 20 years ago. Never looked back. I recently bought a new Mitutoyo because of the absolute feature and the old caliper became intermitent. I could have repaired it, but a new one was only about $40 more ( good...

I had a 3/16 min. dot installed in a Burris by TK Lee. They did a perfect job and the price was right. RWO

I recommend a 3-phase motor, VFD combo. An industrial duty TEFC motor can often be found on eBay for cheap. Recommend automationdirect.com for a VFD. They have good prices and excellent tech support. A sensorless vector capable VFD will cost a little more, but will give more low speed...

For removal of the resin from the barrel, I have had good luck with this method: Wrap the affected area with two thicknesses of paper towel. Soak it with MEK and immediately cover completely with aluminum foil sealed to the barrel at both ends with tape, rubber bands, etc. Make sure the seam...

I replaced the original 2 hp motor on my Jet 13x36 with a NEMA frame, 2 HP, 4-pole, 3-phase. The Jet motor sheave bore was slighty larger than the new motor's shaft, so I made a sleeve and a stepped key to fit it to the new motor. It all went together nicely and the with a Hitachi VFD...

You can get the real deal blank target tagboard here: http://www.pistoleer.com/targets/custom/ RWO

100W incandescent bulbs work well on my Pact Model 1. RWO

For a non bake Brownells coating, try Alumahyde II . After it cures, it's is resistant to gun cleanring chemicals and is very abrasion resistant. RWO

I have both a Timney and a JP in my rifles and either is good. The Timney is non adjustable @ 3# and works perfectly. RWO

Plain old powdered graphite instead of lamp black works well in the sulphur casting method. Don't need the camphor. RWO

A 12V sealed lead-acid works very well if you have a 12 V battery charger. Something like this: http://www.radioshack.com/product/index.jsp?productId=11601511 RWO

If it was made in Taiwan, go for it. I can't speak for the Chinese machines of that vintage. My PBD-1336( Taiwan) was made in 1985 and I have been happy with it. It really turned out nice when I put a VFD on it. RWO

Sometime in the distant, dark past there was an article published on energy testing rifle firing pin mechanisms by dropping a small steel rod of known weight down the barrel and measuring how high the firing pin would drive the rod on firing. IIRC the author tested a dozen or so different...

I beleive the need for "inverter duty motors" on the typical home shop or gunsmith shop lathe or mill is greatly exagerated. The reason is that the duty cycle is very low and the motors themselves are very seldom if ever run at rated load for more than a few minutes. Now, for continous...