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Rifles, Reloading, Optics, Equipment
Reloading
How to reduce bullet runout?
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<blockquote data-quote="zoeper" data-source="post: 236154" data-attributes="member: 10682"><p>OK Guys, seems like i'm going to have to produce some "data" if i wish to make any further posts in this thread<img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite2" alt=";)" title="Wink ;)" loading="lazy" data-shortname=";)" /></p><p>I took those same 16 cases from the "wobly load" after launching those bergers and measured the outsides of the necks in fireformed state, then i neck sized them in my (wonky sloppy) lee classic cast press using a leymann neck sizer die and measured the necks again. I then loaded up some more of those bergers and measured runout near the tips of the bullets. My findings below. (I am metricated, but for those thinking in inches: 0.001 inch = 0.0254mm)</p><p> </p><p>Case No.****runout****runout****runout</p><p>**********after******after*****at tip</p><p>**********firing******necksizing*of bullet</p><p>-----------------------------------------------</p><p>1 *********0.01***** 0.02 *****0.26</p><p>2 *********0.03***** 0.02 *****0.09</p><p>3 *********0.04***** 0.04 *****0.15</p><p>4 *********0.01***** 0.03 *****0.14</p><p>5 *********0.03***** 0.03 *****0.11</p><p>6 *********0.03***** 0.02 *****0.19</p><p>7 *********0.02***** 0.02 *****0.19</p><p>8 *********0.04***** 0.02 *****0.19</p><p>9 *********0.02***** 0.04 *****0.24</p><p>10 *********0.03***** 0.03 *****0.15</p><p>11 *********0.02***** 0.02 *****0.16</p><p>12 *********0.03***** 0.02 *****0.21</p><p>13 *********0.03***** 0.03 *****0.27</p><p>14 *********0.01***** 0.02 *****0.18</p><p>15 *********0.04***** 0.03 *****0.19</p><p>16 *********0.03***** 0.03 *****0.14</p><p>--------------------------------------------</p><p>Total *******0.42***** 0.42 *****2.86</p><p> </p><p>As can be seen from above, the runout stays the same after neck sizing and most of the runout is created during the seating process.(bullet - seating die mismatch) If i am going to continue with the bergers i would have to invest in another seating die. (keeping in mind that the runout is also AMPLIFIED towards the tip of the bullet)</p><p>I will test some sierra game kings as substitute for the bergers next week and if they perform reasonably well and the runout is 4 thou or less, i might continue with the current setup for now.</p><p> </p><p>Thank you all for the input, i find the debate very informative.</p></blockquote><p></p>
[QUOTE="zoeper, post: 236154, member: 10682"] OK Guys, seems like i'm going to have to produce some "data" if i wish to make any further posts in this thread;) I took those same 16 cases from the "wobly load" after launching those bergers and measured the outsides of the necks in fireformed state, then i neck sized them in my (wonky sloppy) lee classic cast press using a leymann neck sizer die and measured the necks again. I then loaded up some more of those bergers and measured runout near the tips of the bullets. My findings below. (I am metricated, but for those thinking in inches: 0.001 inch = 0.0254mm) Case No.****runout****runout****runout **********after******after*****at tip **********firing******necksizing*of bullet ----------------------------------------------- 1 *********0.01***** 0.02 *****0.26 2 *********0.03***** 0.02 *****0.09 3 *********0.04***** 0.04 *****0.15 4 *********0.01***** 0.03 *****0.14 5 *********0.03***** 0.03 *****0.11 6 *********0.03***** 0.02 *****0.19 7 *********0.02***** 0.02 *****0.19 8 *********0.04***** 0.02 *****0.19 9 *********0.02***** 0.04 *****0.24 10 *********0.03***** 0.03 *****0.15 11 *********0.02***** 0.02 *****0.16 12 *********0.03***** 0.02 *****0.21 13 *********0.03***** 0.03 *****0.27 14 *********0.01***** 0.02 *****0.18 15 *********0.04***** 0.03 *****0.19 16 *********0.03***** 0.03 *****0.14 -------------------------------------------- Total *******0.42***** 0.42 *****2.86 As can be seen from above, the runout stays the same after neck sizing and most of the runout is created during the seating process.(bullet - seating die mismatch) If i am going to continue with the bergers i would have to invest in another seating die. (keeping in mind that the runout is also AMPLIFIED towards the tip of the bullet) I will test some sierra game kings as substitute for the bergers next week and if they perform reasonably well and the runout is 4 thou or less, i might continue with the current setup for now. Thank you all for the input, i find the debate very informative. [/QUOTE]
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How to reduce bullet runout?
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