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AR-MPR: Accurizing the Upper Receiver – Test Results

In the following posts: AR-MPR: Accurizing the Upper Receiver – Part II: Milling and Receiver Face Truing AR-MPR: Accurizing the Upper Receiver – Part I: Prep and Welding AR-MPR: Accurizing the Upper Receiver – Overview I’ve documented an experiment in accurizing the upper receiver of the AR-MPR rifle. It was a bit painful to file […]

AR-MPR: Accurizing the Upper Receiver – Part II: Milling and Receiver Face Truing

In this post, I’ll finish covering the accurizing steps and experiments for the AR-MPR upper receiver- so far, we’ve covered the following: AR-MPR: Accurizing the Upper Receiver – Overview AR-MPR: Accurizing the Upper Receiver – Part I: Prep and Welding Following the welding process, I carefully milled and measured the sides of the upper receiver […]

AR-MPR: Accurizing the Upper Receiver – Part I: Prep and Welding

In my last post, outlined some ideas and goals for talking the slop out of the fit between the upper and lower receivers on the AR-MPR rifle. The first step is to remove the gaps between the sides of the upper receiver lugs, and the channels at the front and back of the lower receiver. […]

AR-MPR: Accurizing the Upper Receiver – Overview

A while back, I posted some AR-MPR rifle accurizing plans. This was my first-pass at enhancing the accuracy of the AR-MPR rifle. Since this post, I have had a few range visits (sorry, don’t have photos as the range does not permit photography) where I did not see the kind of accuracy and consistency that […]

RCBS Rifle Bullet Feeder on RCBS Pro-2000 – Some Notes

For a while I have been wondering about the RCBS Rifle Bullet Feeder – and now that I’ve setup and used the 22 caliber kit on the RCBS Pro-2000, I know a lot more about how this tool works, and what it is capable of. Setting up the unit is fairly straightforward, with a requirement […]

AR-MPR – Hornady Lock-N-Load AP Loading 223

Continuing with our coverage of high-volume loading of .223 Remington and 5.56 NATO ammunition for the AR-MPR project, this time we’ll look at using the Hornady Lock-N-Load AP to load for the AR-15. In this video, I’ll show loading in full progressive mode with the use of the Hornady Lock-N-Load Case Feeder system as well. […]

AR-MPR – RCBS Rifle Bullet Feeder on Pro-2000 Loading 223

If you have an AR-15, you know that they tend to chew through ammo very quickly. It’s a lot of fun, but it also gets expensive really quickly, especially if you are requiring match-grade ammunition. The solution is to load .223/5.56 on a progressive reloading press. If you really want to crank it up, you […]

AR-MPR- RCBS Rifle Bullet Feeder Overview Part II

Recently, I gave a quick overview of the RCBS Rifle Bullet Feed System. In that post, I gave an overview of what’s included in the kit. In this post, we’ll take a look at what this system looks like installed on a 5-Station reloading press (The RCBS Pro-2000 in this case). As you can see […]

AR-MPR- RCBS Rifle Bullet Feeder Overview

Phase III of the AR-MPR AR-15 rifle project is really all about “precision mass production” of the ammunition that we’re developing in Phase II (precision single stage loading). There are a couple key things that we’ll explore: first, we’ll look at progressive reloading of .223 / 5.56 ammunition. We’ll also extend our production rates by […]

AR-MPR Phase II – Checking and Correcting Bullet Concentricity

If you are a precision shooter, you care about consistency for the cartridges that you shoot. One of the most important factors to measure and control when reloading match ammunition is bullet concentricity. Simply stated, this is the alignment of the case and bullet. If you have “good concentricity”, you will have the axis of […]

Ultimate Reloader Handles and Bullet Trays for Hornady Lock-N-Load In Stock!

Thanks everyone for your patience while we’ve been out of stock on our ergonomic roller handles and bullet trays for the Hornady Lock-N-Load AP. These items are now in-stock! You can find out more and order them here: Ultimate Reloader Combo Pack for Hornady Lock-N-Load Ultimate Reloader Modular Bullet Tray System for Hornady Ultimate Reloader […]

AR-MPR Phase II – Seating Bullets

In this video, we’ll use the Hornady OAL Gage measurements from our first Phase II loading video: AR-MPR: Phase II – Determining Max COL with OAL Gage and measure the dimensions of the cartridge and magazine to determine the optimal bullet seating depth for the bullet and rifle in question. We’ll then use the Redding […]

AR-MPR – OnTarget Software – Measure Groups Easily

For AR-MPR, I’m chasing a .5 – .75 MOA accuracy goal. Initially, I started with 3-shot groups when I function tested the rifle, but have upgraded the challenge to “consistent 5-shot groups at .5 – .75 MOA”. In order to track my progress, I’ve taken a hint from Paul over at http://accurateshooter.com – use the […]

Great Forum – The High Road – THR

If you spend much time online, you’ve probably at least heard of the online forum http://thehighroad.org This is one of my favorite forums for a couple of reasons: There’s a lot of traffic and good information The members and staff are both knowledgeable and cool to deal with The Handloading and Reloading forum is where […]

AR-MPR: Phase II – Magpul PRS Stock and XTM Rail Panels Install

One of the important aspects of a precision rifle is the overall rigidity of the entire rifle – the action, barrel, stock, and other components – the entire unit must be solid in order to shoot with maximum precision. The AR-MPR rifle was initially put together with an M4-Style 6 position collapsible stock. This imposed […]

AR-MPR: Phase II – Charging Cases with the Redding 3-BR and Hornady Auto Charge

In this video we’ll continue the precision loading process by using the Redding 3-BR powder measure and the Hornady Auto Charge to dispense powder loads. Next, we’ll cover calculating optimal seating depth, and seating the bullets. Thanks, Gavin http://ultimatereloader.com/wp-content/uploads/2010/11/AR-MPR-logo-wide-small.jpg

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