Steve, Reed, and Brad talk about their shooting at Big Boar Tactical just outside of Dallas, Texas. Intro:
Welcome to episode #35 of the AR15 Podcast. I’m your Firearms Radio Network Roving Correspondent Steve here with your host Reed and Brad from the FRN IT team. This is THEE podcast about your favorite black rifle! This show is for you; whether you're building your first AR or you’ve been building ARs for years. There’s something we can all do to take our black rifle to the next level.
Main Topic:Big Boar Tactical FRN Staff Shoot / Training - Description of property: acreage, pond, elevation and surrounded by berms, pistol and rifle targets (steel and paper) line the north and west berms; helicopter sniper targets, 3 story structure - Pistol steel (speed/accuracy with hostage etc.) - Double tap challenge ( 0.25 seconds is good) - Rifle at 25 yds (shooting and reloads) - Rifle at 50 yds (red dot and iron) (shooting and reloads) - Transition drills - Moving and shooting while approaching targets, along with transitions - Stress of shot timer and competition - Dealing with the heat
Otis BONE Tool and O12 Carbon Remover Giveaway O12 removes stubborn carbon fouling with ease BONE tool is the quick clean tool which scrapes carbon and fouling from the bolt, bolt carrier, and firing pin of your AR15.
Winner: Daniel C.
Here is some feedback on the show. Love it. I am new to the AR platform and love my ARs versatility. My next project will be to build one piece by piece. I was curious if it is possible to assemble an AR within a normal show (45-60 min). If so, having a detailed walk through of how to put it together would be great, basically whoever is assembling just narrates what they are doing. If it can be done within an hour it would go to show how easy it is, as well as provide step by step instructions for listeners to download the podcast, crank it up and have someone in our ear explain what to do. Ok keep up the good work thanks for giving us another great podcast to listen to.
Feedback / Listener QuestionsDan M.: I own a Colt 6940, which has a monolithic upper and a Rock Rivers Arms LAR-8 that has a Standard upper. I was wondering if you could do a podcast on the pros and cons of monolithic uppers vs standard uppers.
Tom J.: I've been thinking about building my first AR. Before I buy my lower can you explain the difference between the single stage vs two stage trigger assembly?
David D: Hi Steve and Reed, I have been listening to your podcast for about one month. I would rate it a big six. I am shooting a 223 and a 6.5 Grendel. I built the 6.5 Grendel upper and I am getting great groups with it. I am using a 120 grain Berger target bullets with VihtaVuori N-130 powder. I used the Berger Bullets Reloading Manual, first edition to get the information to load for my Grendel. I am getting half inch groups at 100 yards. Your podcast has been a great teaching tool for me. I have been loading cartridges for almost 24 years. When I first got into to reloading I would read a lot of gun books and magazines. I would read about lubricating the bullets with molly coat. You would have a tumbler with steel shot in it add some molly dry lube and then the bullets. The tumbler would make the steel shot pound the bullets with the molly lube. I do not see anybody talking about lubricating bullets anymore. Did they find a problem with lubing the bullets, did it cause a problem with the barrel. I did add a few photos of my Grendel and a target for you. Thanks keep up the good work
Bob from Keokuk: Reed, You do a fine job on your own but I enjoy the two man podcasts more. You had someone ask a question about melonite finish vs chrome lined.
Chrome lining is a surface plating. So the barrel will be made slightly smaller before lining. The barrel is plated with the Cr to a given thickness to bring the size into specification. I have read different opinions about reducing accuracy. I think it is one of those things while plausible in the real world 99.9% of people will not see a difference.
The melonite finish is not a coating. It is a carbonitriding. There are different methods but the goal of each is to increase the amount of nitrogen and to a smaller extent carbon in the crystal matrix of the steel. By adding Carbon and Nitrogen you make a small layer of the steel extremely hard and abrasion resistant. The steel is not coated but actually changed to a given depth. I can see how theoretically this is better, the barrel is made to size so any imperfections are not magnified by adding a lining and because the steel itself is changed there is no worry of the lining coming apart from the substrate. If cost is the same I would probably go with the melonite. However, if the difference in cost is significant I don't see that I would experience much of a difference.
If you care about the metallurgy here is a thumbnail of what is going on. I am not an expert and this is extremely rudimentary.
Carbon and Nitrogen are very small atoms compared to the iron that makes up the majority of the steel. Molybdenum, Chromium, Manganese and Nickel are all similar size so they take the place of an iron atom in the crystal structure. C and N are extremely small so they live between the iron atoms. By doing so they can make nitrides and carbides in the structure that are extremely hard compared to the iron matrix surrounding them. The C and N that stays in the steel matrix also makes the movement of atoms more difficult so the iron matrix is stronger as well.
Generally in steel making you don't want much Nitrogen dissolved in solution when it is liquid. As the metal changes from liquid to solid the steel cannot hold as much dissolved nitrogen so eventually when the saturation point is reached the nitrogen comes out of solution as gas and leaves pinhole voids in the steel. (Best illustration is to look at ice frozen with some filtered water. You have clear outside surrounding a cloudy center. As the water freezes it cannot hold as much gas in solution. The gas has nowhere to go but into the liquid water remaining. At some point the water cannot hold any more gas so it comes out of solution and you get the bubbles in the center.) When the steel is in a solid solution if you heat it up in a nitrogen rich atmosphere you can get the nitrogen to dissolve into the surface. Many of the processes I have read about use a molten salt bath or a plasma to excite the atoms enough to dissolve in. Once you have the depth that you need the metal is cooled and the nitrogen is trapped into the crystal structure.
If you are still awake, thanks for the podcasts.
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