{"id":321,"date":"2022-11-25T18:48:09","date_gmt":"2022-11-25T18:48:09","guid":{"rendered":"https:\/\/dauntlessendeavors.com\/?page_id=321"},"modified":"2022-11-25T21:46:48","modified_gmt":"2022-11-25T21:46:48","slug":"measuring-a-rimfire-chamber-with-pin-gauges","status":"publish","type":"page","link":"https:\/\/dauntlessendeavors.com\/?page_id=321","title":{"rendered":"Chamber Measurement"},"content":{"rendered":"[vc_row][vc_column width=”5\/6″][vc_column_text css=”.vc_custom_1669402313976{margin-bottom: 0px !important;}”]\n

Measuring a Rimfire Chamber with Pin Gauges<\/h1>\n[\/vc_column_text][\/vc_column][vc_column width=”1\/6″][mk_button size=”medium” url=”https:\/\/dauntlessendeavors.com\/wp-content\/uploads\/2022\/11\/22lr-chamber-template-for-website-1.xlsx” target=”_blank”]Excel Template[\/mk_button][\/vc_column][\/vc_row][vc_row][vc_column][vc_row_inner][vc_column_inner][\/vc_column_inner][\/vc_row_inner][vc_column_text css=”.vc_custom_1669404681388{margin-bottom: 0px !important;}”]I believe that when it comes to accuracy, the barrel is the most important component of a firearm, and the chamber is a critically important part of the barrel. It’s the chamber where accuracy is gained or is forfeited. Perhaps it is more important in a 22 Long Rifle chamber than in any other.<\/p>\n

Why Do I Want to Know My Chamber Dimensions?<\/h3>\n
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  1. When I rechambered two Ruger American Rimfire 22LR rifles from the standard factory \u201csporter\u201d chamber configuration to the smaller \u201cBentz\u201d chamber, I didn\u2019t want to shorten the barrel any more than absolutely necessary, yet I needed to shorten it enough so that the smaller reamer would completely clean up the original chamber. See the video here.<\/a><\/li>\n
  2. Certain manufacturers advertise their rifles as having \u201cmatch\u201d chambers. How do we know what that actually means? Is it really a \u201dmatch\u201d chamber or just marketing hype?<\/li>\n
  3. In addition to the SAAMI 22 Long Rifle chamber designations for \u201cSporting\u201d and \u201cMatch\u201d chambers, there are a dozen other wildcat \u201cMatch\u201d chambers. How can we tell which one is best and which one is in our rifle?<\/li>\n
  4. Being able to measure chambers and establish a database is one more step towards recognizing and tracking patterns or trends of optimizing 22 Rimfire accuracy.<\/li>\n
  5. Ultimately, it really doesn\u2019t matter if you are working in a machine shop or driving your car. If you want to get somewhere, you need to know where you\u2019re starting from.<\/li>\n<\/ol>\n[\/vc_column_text][\/vc_column][\/vc_row][vc_row][vc_column][vc_separator color=”white” border_width=”2″ el_width=”60″][\/vc_column][\/vc_row][vc_row][vc_column][vc_column_text css=”.vc_custom_1669404727725{margin-bottom: 0px !important;}”]\n

    Measuring a 22LR Chamber with Pin Gauges<\/h2>\n

    Notes:<\/h3>\n
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    1. Your pin gauges need to have sharp, square corners, at least on the end you insert into the chamber. If the end is rounded or chamfered, your results will be confusing.<\/li>\n
    2. Initially, I tried plotting all the data points with CAD (computer-aided design) software. However, I now prefer using Excel software because nearly everyone has it, and it will use every single data point (that I choose) to calculate the line equations.<\/li>\n
    3. You might find a point or two that just doesn\u2019t seem \u201cfit\u201d well on your graphs. This could be caused by a number of variables, including:\n