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The Range
Ammo & Reloading
Dillon SDB wild variances in OAL
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<blockquote data-quote="bigbadge" data-source="post: 1012485" data-attributes="member: 80"><p>I am fairly new to reloading. </p><p></p><p>I have been mostly loading 124 gr. FMJ Montana Gold bullets. </p><p></p><p>Yesterday, I decided to start loading 147 gr. FMJ Montana Gold bullets, Winchester cases, Federal small pistol primers with an OAL of 1.158. </p><p></p><p>I mixed loads last night with Titegroup powder. I made small batches with 3.0, 3.1, 3.2 and 3.3 grains of powder. I shot them today and liked the 3.3 the best. When I got home, I checked all the settings on the SDB and set to reloading some more. </p><p></p><p>I loaded 25 rounds and began running them through my caliper to double check. I was shocked! The lengths ran from 1.155 to 1.171!<img src="/images/smilies/faint.gif" class="smilie" loading="lazy" alt=":faint:" title="Faint :faint:" data-shortname=":faint:" /></p><p></p><p>I figured that I must have royally screwed something up - BTW there is no TV, radio, windows or people in my room with me. So, I checked and re-checked everything, and did adjust the seating stem. </p><p></p><p>I ran another batch of 25, being extra diligent about all my actions. I checked this batch through calipers also. Again, I had the same wild spread. </p><p></p><p>I checked all of the adjustments and then I then loaded a handful one at a time. The came out perfect (+/-0.02). </p><p></p><p>I then ran two batches of 4 through. All but one were larger than 1.162. </p><p></p><p>I gave up before my frustration got the better of me. </p><p></p><p>Any help is greatly appreciated. </p><p></p><p>Thanks in advance. </p><p></p><p>Don</p></blockquote><p></p>
[QUOTE="bigbadge, post: 1012485, member: 80"] I am fairly new to reloading. I have been mostly loading 124 gr. FMJ Montana Gold bullets. Yesterday, I decided to start loading 147 gr. FMJ Montana Gold bullets, Winchester cases, Federal small pistol primers with an OAL of 1.158. I mixed loads last night with Titegroup powder. I made small batches with 3.0, 3.1, 3.2 and 3.3 grains of powder. I shot them today and liked the 3.3 the best. When I got home, I checked all the settings on the SDB and set to reloading some more. I loaded 25 rounds and began running them through my caliper to double check. I was shocked! The lengths ran from 1.155 to 1.171!:faint: I figured that I must have royally screwed something up - BTW there is no TV, radio, windows or people in my room with me. So, I checked and re-checked everything, and did adjust the seating stem. I ran another batch of 25, being extra diligent about all my actions. I checked this batch through calipers also. Again, I had the same wild spread. I checked all of the adjustments and then I then loaded a handful one at a time. The came out perfect (+/-0.02). I then ran two batches of 4 through. All but one were larger than 1.162. I gave up before my frustration got the better of me. Any help is greatly appreciated. Thanks in advance. Don [/QUOTE]
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