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Hunting
Long Range Hunting & Shooting
Thoughts and experience with expander dies to set bullet tension.
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<blockquote data-quote="holdinsteady" data-source="post: 1663506" data-attributes="member: 81848"><p>This past winter I did a test of 300WM Winchester brass in my Ruger PR to see how many loads I could get from this "cheap brass". I pay close attention to neck tension....usually try for a .0015 neck tension in all my rifles. I minimally neck size with a Redding bushing die only to the point where I get a little resistance when using the K&M expander mandrel. I use a Redding body die to bump the shoulder back as needed and anneal every 3 firings. I trimmed to spec as required during each reload. I have a portable loading bench that I can use at bench side.....slides into the hitch receiver of my pick-up. I used 2 different pieces of brass (both Win) for the test, shooting separate groups at 200yds. I use HBN coated bullets and loads were fairly hot....208 gr Hornady ELD, 72.2 gr RL22,Fed mag primer, COAL 3.603", ave velocity was 2935 fps. ES was 18 and SD was 6.9 for 23 shots. I was able to get 23 loads before I had a small head separation......and I believe that was do to an oversight on my part.....I think I may have bumped the shoulder back too far the last time thru the die. 23 rounds went into 1.2 moa at 200yds on that piece of brass. I retired the other piece of brass at that point. My take from this experiment was that Win brass is as good as anything on the market when prepped properly and that minimal sizing with consistent neck tension coupled with proper annealing will produce good results. I use K&M expander mandrels 100% of the time after neck sizing and just before bullet seating.</p></blockquote><p></p>
[QUOTE="holdinsteady, post: 1663506, member: 81848"] This past winter I did a test of 300WM Winchester brass in my Ruger PR to see how many loads I could get from this "cheap brass". I pay close attention to neck tension....usually try for a .0015 neck tension in all my rifles. I minimally neck size with a Redding bushing die only to the point where I get a little resistance when using the K&M expander mandrel. I use a Redding body die to bump the shoulder back as needed and anneal every 3 firings. I trimmed to spec as required during each reload. I have a portable loading bench that I can use at bench side.....slides into the hitch receiver of my pick-up. I used 2 different pieces of brass (both Win) for the test, shooting separate groups at 200yds. I use HBN coated bullets and loads were fairly hot....208 gr Hornady ELD, 72.2 gr RL22,Fed mag primer, COAL 3.603", ave velocity was 2935 fps. ES was 18 and SD was 6.9 for 23 shots. I was able to get 23 loads before I had a small head separation......and I believe that was do to an oversight on my part.....I think I may have bumped the shoulder back too far the last time thru the die. 23 rounds went into 1.2 moa at 200yds on that piece of brass. I retired the other piece of brass at that point. My take from this experiment was that Win brass is as good as anything on the market when prepped properly and that minimal sizing with consistent neck tension coupled with proper annealing will produce good results. I use K&M expander mandrels 100% of the time after neck sizing and just before bullet seating. [/QUOTE]
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Thoughts and experience with expander dies to set bullet tension.
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