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About pbwe

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  1. Wellll, the mention of screen takes all the romance out of it.
  2. Public service announcement: DHS orders 25 million 12ga slug and 00
  3. I think these are related observations. Too much in engineering nowadays, the aggressive cost cutting practices result in the bulk of capital used during the early design and procurement work, and late project work (ha! where welding occurs) becomes cost constrained. Since engineering is a relative high wage scale cost, every managment effort is made to limit it. In general, the persons working early in the project (typically discipline engineers) are not the same as those closing out the project (procurement/logistics engineers). Technical and same employer continuity for most engineers (especially later generations) does not exist anymore, and engineers are often tasked with work that they have no depth of experience with. And welding engineering, what can be said? It is too often an enless string of oh-schitt moments because no one controlling the purse strings has a clear understanding of its complexity or place in the course of project work.
  4. The variety of austenitic stainless steel types are developed for practical reasons. The utility of type 304 for all service conditions is not universal, e.g.: consider with simple sea water and that annoying chloride ion.
  5. The tint is a high temperature chromium oxide, and the color indicates the temperature at which the oxide formed and/or the thickness of the oxide. There is no basis for metallurgical embrittlement in this context and the oxide forms in the solid state and is a surface film only. For the weld shown, the blue tint is not an issue, it is wire brushed away, but some reqirements may limit tinting to the straw color for surfaces in corrosion service. The consistency of the the tint areas along the length of the weld reflects both shielding gas coverage and reduced heat flow in the thinner pipe wall. The equal leg fillet weld indicates the welding heat is correctly balanced/controlled. If tinting were an issue, one suggestion would be to use a gas lens combined with a slightly wider gas cup.
  6. 500 rnds of CCI 22 wmr 40 gr. from bass pro. First buy of 22 wmr in more than 6 months. 100 rnds of Barnes TSX in 308 for the Saiga. Not cheap, but good to have in inventory.
  7. ~30 yeas ago, I spent summers hiking in Glacier Natl. Park and Waterton. There were still grizzly there at the time. I made "clappers" out of 8" long 2x4. Eventually put on hand straps and neoprene padding (after a time, hands would go numb otherwise). These were light, easy to hang, made a nice loud clap' and were easy to use frequently. On occasion I did hear crunching through the brush, but never encountered any bear up close.
  8. I'll second the Vanentine One. Don't speed much nowadays, but the jurisdictions are tight for cash and all leniency is going away. (if speeding does not get you, the rolling stop or unsignalled lane change will) It's nice to know where they are in any case (V1 delineates multiples of front, side, and rear origins), and even going with the flow can be 15 over, so when it alarms I check my speed. The lasers are challenging, but the V1 has detected them with good lead time provided you are not the first in line, but immediate braking/down shifting is advised in any case. Had my first one stolen when a friend was using it, replaced it for 300 off craigslist with current software. I wish he would come up with a discrete, permanent mount, small front and rear windshield mount satellite detectors that could be wired to a concealable dash unit. Despite the added install work, having the satellite option would be nice.
  9. In case this is useful; for my DIY surface dressing, I take cut pieces of SiC wet/dry automotive abrasive paper and "Elmers" glue it to appropriately sized (flat or radius) wood pieces (gluing the radiused forms takes a bit of practice; preform the paper and keep working it as it the glue sets). I use it dry only. On hard steels the SiC media does not last long, but it is easy to get accuracy and control of cut. 320 grit is where I start (exept when single cut mill smooth needle filing is first needed), and 600 is where I finish, and then lightly work the action with automotive "scratch remover" compound to polish at the precise metal-metal interface. Finish with a thorough solvent clean.
  10. "Current metallurgical theory is that the testing process itself is damaging, and weakens the bolt. Batch tested is probably the best solution, that and understanding that no manufacturing process is perfect and the internet now allows the smallest possible percentage of anecdotal stories to be perceived as normal." If the "testing process" simulates normal use, there should be no significant damage to, or metallurgical deterioration of the material (here the component steel). "Batch testing" of service critical components should be standard practice. Still, the particular techniques of heat treating and the QC techniques for selecting a "representative" test samples from the population, if not correctly designed, can remove confidence with batch testing. Looking a the "shattered" bolt, there being multiple pieces, and evident brittle fracture surfaces, I tend to think that the part was, essentially, not tempered. With a hardenable steel, as a rifle bolt should be, the steel should be metallurgically "clean" (low inclusion density and small inclusion size) and have a homogenous microstructure (nominally same size and shape of crystals that make up the steel at a microscopic scale); this is heated quite hot to produce a single phase structure (but not too hot or the grains will grow), and then quenched very fast (in water, or in salt water, or in oil, depending on the particular metallurgical design) to get the hardest possible, or near so, metal; in this state, the quenched metal is quite brittle, as like glass is brittle, and such an engineering material is normally not desirable because brittle materials chracteristcally have low impact toughness, which one might intuitively agree a rifle bolt should have; brittle materials are characteristically "notch sensitive", that is, if there is a sharp geometric feature, this acts as a stress concentrator, and under impact loading, fracture can be easily initiated there; to remove the brittleness, the steel is then tempered to significantly improve the material's impact toughness; if in a furnace batch of components, some region of the steel mass does not see enough time at design temperature, then the tempering will be incomplete; or if the temperature spikes too high, then the metallurgy can degenerate for other reasons and result in embrittled material. So, heat treatment consist of at least two (and often more) steps of thermal cycling; first the material is austenitized and fast quenched, and then the material is tempered and slow cooled.
  11. Regarding who brings their problems where, consider: "Confessions of an economic hitman" and "Apologies of an economic hitman". Screwing all of Central and South America, is where it's at.
  12. Mexican vigilantes form to face down cartel crime. Note the presence of guns in civilian hands. The challenge for the US [citizen] is that the government is the organized crime.
  13. We can have lives ruined on trumped up charges. They can get retrained. Sounds fair.
  14. The movie is a collage of real information facets, and salutory for that. If interested parties want to continue to watch/learn the about all the pieces in the puzzle, and in real time: Then www.zerohedge.com. and the roster on their sidebar I call zerohedge a front row seat on the slow motion train wreck of Western civilization. Essentially all the film topics relating to the controlling factions has been discussed for years on zerohedge. In general, their's is information that the mainstream media intendedly does not report. As I see it, the real issue for the 99% will be to form the coherent organizations necessary to oppose the 1% and their established systems. The fragmentation of the 99% is used against them very effectivley to keep them fragmented. This touches all aspects of day to day life.
  15. pbwe

    HD ammo

    Thank you GunFun for the write-up. I too have the #4 shot loaded as primary for HD in the Saiga. Slugs are on hand for machinery, cover, or distance. (as a semiauto, there has been not one failure in hundreds or rounds) However, the first at home goto is a semiauto 22 wmr rifle (fitted with aimpoint micro and kidd 2 stage. loaded with 50 gr. softpoints). After a couple years working with pistols, I decided that accuracy is primary, and pistols, for variant conditions of anxiety, no/low light, or longer distance, required simply too much time and effort to develop and maintain control. The rifle makes it much easier to be quarter size accurate to any distance on the property. The rifle is also much easier to operate from behind cover. My wife has gotten used to the pistols, but does not like them. She like the low recoil and both eyes open aiming with the rifle, and it is now stowed hidden on her side of the bed, The pistols are deployed to concealed carry, or scattered hidden about the property and vehicles.