Search results

glp, You are correct. 3-6" is about where most of the powder burns - after that, it is expanding. Temperature is why barrels usually wear out at the throat, rather than the muzzle. Chemical attack at high temperatures and pressures is the primary killer of barrels, not mechanical wear...

Rule of thumb (forget where I read it): If the outside of the barrel is too hot to hold (about 160 *F), the inside is well over 400 *F. Internal temperatures this high result in ammunition "cooking off" if exposed for a sufficient length of time. How soon that temperature is reached depends...

Normal fix for such a situation is to thoroughly clean off the area(s) where serial numbers were - then using a Q-tip, apply acid. Metal under the numbers is usually stressed as a result of the numbering operation, so the acid brings this pattern out. NOTE: I am told (by reliable sources)...

The plant was never owned by Winchester, and Olin (parent company which used to own the Winchester trademark) sold it to General Dynamics about 10 years ago. St Marks Powder is presently still a subsidiary of GD, and all they make is ball and flake powder.

Can't speak for other parts of the US, but it has been rainy at my house near Portland, OR. As for roads in the heat, IIRC, there was a stretch of road in the Southwest US which required firefighting assistance on warm days. The local transportation authorities used asphalt which incorporated...

Remington 7-1/2. Hard and suitably thick primer cup.

At least three of the bullets have distinct rifling marks. In the band of light, one is near the top of the image, one at the bottom. The third is to the left of the band of light, and just slightly below the midpoint of the column. (Which appears to have been cast in some type of plastic...

"W" is the symbol for tungsten (from "wolfram" - German). "Ti" is the symbol for titanium.

Foul-Out units have been discontinued, due to lack of sales. This is a pity, as they work very well on lead fouling, and less well on copper. However, do-it-yourself versions (including the chemicals) are popular, instructions for making both are at...

Barrel wear is primarily due to chemical interaction of powder gasses with steel at high temperature. Find a material that doesn't nitride or carburize like steel does, and wear rate goes down. Rhenium and tungsten are two good candidates, but you and I can't afford them. Chromium lining and...

Ticonderoga class cruiser, the cannon is a 5"/54 Mk 45. Which uses smokeless powder, not black. The powder charge for this weapon is loaded in a steel or brass cartridge case. From http://www.navweaps.com/Weapons/WNUS_16-50_mk7.htm : Propellant Charge (see Note 8): Post World War II Full...

Normal wallpaper paste is too thick as mixed. Thin it by carefully adding water and mixing (might want to use a power drill accessory for this), actual amount of thinning is less than 25%. The type of paste matters. Do not get the clay based versions (brownish). What you want is the...

Another option... From 1993 to 2002, copies of the Model 52 Sporter were made by Miroku in Japan. These were sold as copies of the Winchester 52B, but were actually closer to 52C sporters (including the Micro-motion trigger). These were initially sold by Browning, but later, by Winchester...

The reporter behind the story is John Stossel. Stossel is a Libertarian, and IIRC, was hired by ABC for his investigative reporting. He agreed, on the condition that once (twice?) a year, he would be allowed to run a series of stories that the ABC news vetting committee would have little or no...

Link to Finnish Suppressor study: http://guns.connect.fi/rs/suppress.html . Has some documentation on building range structures to reduce noise. NRA Range Source Book: http://materials.nrahq.org/go/products.aspx?cat=Range%20Source%20Book . The CD Rom version is the less expensive one. Why...

The 62 grain FMJBT used by militaries around the world has a steel penetrator tip on top of the lead core. Since steel is less dense than lead, the bullet ends up being longer than a completely lead cored projectile of the same weight. The 62 grainer will shoot well out of a 1-9" twist barrel...

Agreed. How about a 2 MOA lower point of impact @ 100 yards when going from a 168 to a 155 grain projectile? (Same manufacturer, 155 grainer flying about 150 FPS faster.) Or a 3 MOA LATERAL shift (no change in elevation) when going between 2 different manufacturer's 155 grain bullets? Both...

Trijicon also makes sights for ARs. Some require batteries, many do not. Here's a vendor link for their ACOG series scope sights: http://www.opticsplanet.com/trijicon-acog-riflescopes.html NOTE: Trijicon makes a variety of ACOGs, including models with built-in iron and reflex sights...

Hodgdon has load information for a 6mm-250 cartridge, which has slightly less capacity than a 6XC Though load data for this cartridge is only with Hodgdon powders and , it should be possible to use this as a starting point for developing loads with the components you described. Website for the...

Interesting things appear at gun buybacks. At one held in December 2012 in Connecticut, someone turned in an MP-44. At the recent one in Seattle, something more interesting appeared. Read the news at...