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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. […]

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