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If you can’t find components locally, I’ve had good luck with Powder Valley and Midsouth Shooter’s Supply. As noted in the New Brass Prep article, I already had a foundation of data on my brass. Initial load development for a long range precision rifle can take shape in a variety of ways. Now I know how much the case stretched from firing, and how much I need to push it back during the next sizing cycle. My scope is a N/F ATACR 5-25 with Mil-r reticle. At 75.0 H1000, they shot into .5 MOA @ 2800 fps CBTO was 2.850″ (.020″ off the lands). Enter your email address to subscribe to Panhandle Precision and receive notifications of new posts by email. To that end, I started with H1000 powder and CCI 250 primers. It will definitely need some tuning, though. This was a $200 rifle that we are going to test to see how accurate it can be with a very budget setup. Please go to Appearance > Sidebars and drag a widget into User Submit Sidebar. Point of impact change with various loads. Looking good Sam, I am also looking forward to the next update. Any unusual things that occur with the rifle or scope during the testing, like a sudden shift in zero or mechanical issues. In this video I update the Thompson Center Compass project chambered in 300 Win Mag. This was a $200 rifle that we are going to test to see how accurate it can be with a very budget setup. Here are some of the key points to my process and what I’m learning about this rifle. March 25, 2016. It is a place to teach, to learn, and to collaborate and interact. The 208 AMAX reached 2900 fps without pressure signs. November 15, 2016 Bill Marr Cartridge Selection, Precision Rifles, Reloading, Reviews 0. That includes neck O.D., head to datum length, web O.D., and overall length. My threshold for precision from my long range hunting rifles is .5 MOA. Every point of measurement on the brass. This leaves the .30-338, .300Win Mag and .300 Weatherby, all of which have a long and deserved reputation for excellence. The 230s shot well in my 300WM, but were relatively slow compared to the 210s…by a bunch! Of course, I adhered to my Five Simple Rules for reloading precision ammo. There are several options available for receiving notifications of new posts to include via email, push notifications, Facebook, Twitter, Reddit, Discord, and more. Seating depth in relation to the lands and magazine restrictions. Hodgdon’s Extreme Powders also have the benefit of not being sensitive to temperature swings. The final result of initial load development might not be the exact recipe you end up using, but it should show you where to focus your time and effort. I know you’ve touched on some of it in previous articles and videos but I’d like to see something more in depth . Any load data that you can share on that bullet with H-1000 powder would be appreciated. In this video we go over more reloads in our Thompson Center Compass and updates moving forward. Over the last several weeks, I’ve come up with an outline of how the final load for the 300 Winchester Magnum Project might look. Also I deviated from the article in that instead of doing two 3 shot groups, I did one 5 shot group for each load. I’d like to see an article on the different things you check or the notes you take during brass prep and load development. I refuse to go down the rabbit hole of using components that are hard to find. I recommend buying these components in lots big enough to wear out a barrel. I’ve tried mixing powder from different lots with poor results. Thompson Center Compass – 300 Win Mag load development -168 Berger Classic Hunter with Reloder 26, Lee X-Press Shellholder 16 for Lee APP Reloading Press, MEC Pan Sifter for MEC Marksman Single Stage Reloader. The .300 Weatherby first appeared in 1944 and was Roy Weatherby’s first high-performance cartridge. Some of my best loads over the years were from friends who gave me the exact recipe to use. Internet forums, reloading manuals, and articles like this are all sources to consider. Don’t discount word of mouth, either. I just pick one or the other and try it. As long range hunters, we have a very good selection of projectiles to choose from. In this video we go over more reloads in our Thompson Center Compass and updates moving forward. COAL is 3.62 in AI magazine. A good barrel should have no trouble spitting out sub-MOA groups with any one of those bullets during initial load development. Based on the article, I loaded up 3 loads for my 300 win mag. Sam, How do you know which component to change and when to change it. Much more than that, and my confidence in taking the long shots goes down. Notify me of follow-up comments by email. Sam, I have a .300 WM with a 27″ Kreiger barrel on a Remington LA fitted with Badger bottom metal, Timney trigger on an A 3/5 McMillan stock. They can vary in dimension. It’s a popular cartridge that’s been around for over 50 years. All groups were in the .50 to .75 MOA range, reaching 2800 fps muzzle velocity with no pressure signs. Subscribe for more informative videos: https://goo.gl/pMHmvu, Rifle: Thompson center compass 300 Winchester Magnum Boyds Pro Varmint Stock with adjustable comb height EWG 20 MOA scope base SWFA fixed 16 power scope Seekins Precision Scope Rings MCARBO trigger spring kit M4-72 SEVERE-DUTY BRAKE .308 BLACK. The content presented here is intended to inform, to educate, and even to entertain. They all involve the mixing of components until you find a combination that works. Keeping good notes of your loading process is critical to safe, efficient reloading. This is a point worth stressing at every opportunity. For instance, if I have multiple comparator inserts for a caliber, which one did I use? They all involve the mixing of components until you find a combination that works. 300 Winchester Magnum load development: Sierra .308 195 gr. The more sharp edges, the better. There’s a lot of information available about loading for the 300 Winchester Magnum. I have settled on the Berger 230 grain Hybrid Tactical. In this video I update the Thompson Center Compass project chambered in 300 Win Mag. Tipped MatchKing (TMK) REVIEW. This barrel is very stable, with all groups impacting within one inch of each other. We load up ADG Brass with the 168 Berger Classic Hunter and Reloder 26. I keep notes in my loading journal and on targets, of as many details as possible, including: Nice write up, looking forward to further updates. Any changes in neck tension during the process. Loved or hated, the .300 Winchester Magnum was guaranteed success due simply to the market demand for a readily available .300 magnum cartridge from a major US manufacturer. The article shows 4 but I already had data on one of the lengths so I didn't need to do that one again. Powders, primers, bullets, and brass can all be interchanged to varying degrees. I was able to break 2900 fps without pressure with the 215 Hybrid. From my experience, as long as the bullet is placed in the right spot, match-style bullets work very well at killing animals quickly. I shoot a lot. From left to right: Berger 215 Hybrid and 230 OTM Tactical, Hornady 200 ELD-X and 208 AMAX. However, barrels and reamers have different tolerances, measurements can be sloppy, and component lots can change. Contact Form 7 or GravityForms plugin is required! Think of it as the rough draft of a story. We load up ADG Brass with the 168 Berger Classic Hunter and Reloder 26. Here is a good example. But with hand loaded ammunition in long magazine rifles such as the Winchester M70 and Remington M700, the .300 Winchester Magnum showed great strengths. Group size and velocity, along with environmental conditions while testing. It will most likely need some editing, but the basic structure is there. It didn’t affect any of them. I don’t. For reference, one pound of powder equals 7000 grains. From past experience, this combination of powder and primer produces good accuracy, stable velocity, and low velocity extreme spread. Just a guy at his reloading bench. These are the bullets I’ve tried so far in the 300WM: The 230 OTMs shot very well in the 300 WM. We use the Satterlee load development style to evaluate this combo and find a velocity Node to use for our next time with this powder. Powders, primers, bullets, and brass can all be interchanged to varying degrees. I’ve had great success with Berger, Hornady, and Sierra match bullets in multiple calibers. Federal FED215M primers are used. Once I identify a piece of the puzzle that works well, I want to be sure I can get enough of it to keep shooting at the volume I like. I primarily focus on long range reloading. Copyrights © 2020 all rights reserved by Panhandle Precision, Top 20 Most Frequently Asked Reloading Questions, Gunwerks 300 Winchester Magnum Brass Review, My Reloading Tool List: What I Use and Recommend, Practical Practice for Long Range Hunting, Long Range Hunting With a Precision Rifle, Trajectory Validation: Ten Steps for Success. Tools used for loading and measuring. I want the bullet to land in the vitals and cause massive bleeding. I don’t think you can tune a 1 MOA load very easily, if at all. (adsbygoogle = window.adsbygoogle || []).push({}); The Reloaders Network focuses on firearms, shooting sports, reloading, bullet casting, and the related gear and accessories. This site uses cookies to improve your experience. Both of these components are available locally, as well as online in bulk quantities. Best .300 Win Mag Loads. Initial Load Development: 300 Winchester Magnum Project. I used information from all of these sources to formulate a plan for my initial load development. When I found out Sierra was introducing .308″ diameter 195 grain Tipped MatchKings (TMK) I was thrilled to get my hands on some. In other words, if you try to tighten a group, how do you know if you need to change the seating depth or the powder charge etc. Before I pursue a load any further, I like to see some groups in the .5 to .75 MOA range. I don’t need or want a bullet that has controlled expansion or a bonded core for this kind of work. I changed from a .334 bushing to a .333 bushing to see if it affected the ELD-X load. Eagle Cam long range and Wifi Repeater Part 2, Gordons Reloading Tool (GRT), How to Start Using, 44 Magnum Fast Movers: Chronograph Results: Ported vs NonPorted. So far, it’s producing those same results in the 300 WM. The mixture might not change much from lot to lot, but it’s a variable worth eliminating.

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