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Rifles, Reloading, Optics, Equipment
Reloading
Noreen .338 Lapua (semi-auto) Reloading Questions
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<blockquote data-quote="BobTWB" data-source="post: 1423444" data-attributes="member: 105349"><p>I have accepted the task of developing a load for a friend's Noreen Bad News .338 Lapua. This is an AR-styled semi-automatic for those not familiar with the gun in question. As I was reading about the caliber and collecting my supplies, I ended up winning an auction for a Savage 112 single shot in .338 Lapua so I now have my own gun in this caliber to work on as well.</p><p></p><p>I bought some pulled 250 grain Speer Grand Slam bullets just to get started with a relatively cheap projectile. I did my first load at 3.510" using new Lapua and Norma brass, Federal 215 primers and 84.8, 86.9 and 88.9 grains of H1000 powder. Distance to rifling is about 0.020 in the Noreen and 0.070 in the Savage. I calculated these to be well below max pressure loads using multiple manuals and in QuickLoad with their standard volume of 108 grains of water. The rounds all fired fine without incident and with no pressure signs. I wasn't working on accuracy, I was mostly doing this to check for signs of excess pressure and to measure fired case volumes for QuickLoad.</p><p></p><p>I measured volumes after firing and got the following measurements for the two chambers - Savage: 116.1 Norma, 115.4 Lapua, Noreen: 115.7 Norma, 115 Lapua.</p><p></p><p>Using a Wilson case gage, I measure the new brass at 0.002" under maximum length. The Savage cases were only 0.003" longer, i.e. only needed to be bumped back 0.001" to get to fit flush in the gage. The Noreen cases had grown 0.016" and needed to be bumped back 0.014" to get to fit flush.</p><p></p><p>I've always full length sized back to standard dimensions when using auto loading cartridges. My first question is do others feel that the Noreen case growth is an indication of excess headspace or is it just a quirk of an auto-loading rifle's extraction under pressure? I had adjusted the gas block all the way in, but the Noreen still cycled, tossing the cases out fairly weakly at 3 o'clock. </p><p></p><p>I've written Noreen for help, but they take the stance that they don't recommend reloads and won't give any advice. Since my friend wants me to use Rocky Mountain bullets for his hunting round and he's had unsatisfactory accuracy with factory bullets, "no reloads" won't get him the solution he's wanting. Thanks for any help.</p><p></p><p>Bob</p></blockquote><p></p>
[QUOTE="BobTWB, post: 1423444, member: 105349"] I have accepted the task of developing a load for a friend's Noreen Bad News .338 Lapua. This is an AR-styled semi-automatic for those not familiar with the gun in question. As I was reading about the caliber and collecting my supplies, I ended up winning an auction for a Savage 112 single shot in .338 Lapua so I now have my own gun in this caliber to work on as well. I bought some pulled 250 grain Speer Grand Slam bullets just to get started with a relatively cheap projectile. I did my first load at 3.510" using new Lapua and Norma brass, Federal 215 primers and 84.8, 86.9 and 88.9 grains of H1000 powder. Distance to rifling is about 0.020 in the Noreen and 0.070 in the Savage. I calculated these to be well below max pressure loads using multiple manuals and in QuickLoad with their standard volume of 108 grains of water. The rounds all fired fine without incident and with no pressure signs. I wasn't working on accuracy, I was mostly doing this to check for signs of excess pressure and to measure fired case volumes for QuickLoad. I measured volumes after firing and got the following measurements for the two chambers - Savage: 116.1 Norma, 115.4 Lapua, Noreen: 115.7 Norma, 115 Lapua. Using a Wilson case gage, I measure the new brass at 0.002" under maximum length. The Savage cases were only 0.003" longer, i.e. only needed to be bumped back 0.001" to get to fit flush in the gage. The Noreen cases had grown 0.016" and needed to be bumped back 0.014" to get to fit flush. I've always full length sized back to standard dimensions when using auto loading cartridges. My first question is do others feel that the Noreen case growth is an indication of excess headspace or is it just a quirk of an auto-loading rifle's extraction under pressure? I had adjusted the gas block all the way in, but the Noreen still cycled, tossing the cases out fairly weakly at 3 o'clock. I've written Noreen for help, but they take the stance that they don't recommend reloads and won't give any advice. Since my friend wants me to use Rocky Mountain bullets for his hunting round and he's had unsatisfactory accuracy with factory bullets, "no reloads" won't get him the solution he's wanting. Thanks for any help. Bob [/QUOTE]
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Noreen .338 Lapua (semi-auto) Reloading Questions
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