M67 Posted October 23, 2008 Share Posted October 23, 2008 (edited) ----------------------------------------------------------------------- K Edited December 9, 2013 by Guest Quote Link to comment Share on other sites More sharing options...
Øvrigar'n Posted October 23, 2008 Share Posted October 23, 2008 Norma påstår at de har Sierra MK i 69 grs, 77 grs og 80 grs til kr. 1.45/stk. Se litt ned på sida: http://www.norma-skytterlag.net/index.php?news=0&stype=1&sid=sklkomp/kuler.htm Når det gjelder krutt har jo Vizla her på forumet gjort en hel masse tester. Mener det er minst en tråd om dette her. Ellers kjørte jeg en liten kruttsammenligning i QuickLoad. Her er det gått ut fra .223 Rem data (ikke SAAMI) som ligger i QuickLoad. Pipelengde 67cm og ladninger i nedre del av det "gule" området. Da ser kruttabellen slik ut: Powder type Filling/Loading Ratio Charge Vel. Prop.Burnt P max P muzz Btime % Gramm m/s % MPa MPa ms --------------------------------- ------------------------------------------------------- Norma MRP 115,8 1,88 869 94,7 366 64 1,254 Raufoss RA15 117,7 1,85 858 92,9 366 62 1,260 Bofors RP5/NP ~approximation 117,7 1,85 858 92,9 366 62 1,260 Norma URP 109,1 1,68 858 98,1 366 57 1,262 Bofors RP19 ~approximation 109,2 1,68 858 98,1 366 57 1,262 Vihtavuori N550 105,9 1,68 858 98,0 366 57 1,268 Vihtavuori N560 117,1 1,86 857 89,9 366 62 1,261 Norma 203 old 101,1 1,59 848 99,6 366 53 1,286 Norma 203B 99,1 1,54 848 99,1 366 53 1,278 Raufoss RA11 98,5 1,53 847 98,7 366 53 1,278 Bofors RP11 ~approximation 98,5 1,53 847 98,7 366 53 1,278 Bofors RP14 ~approximation 114,0 1,77 843 92,8 366 57 1,268 Norma 204 107,2 1,72 838 92,4 366 56 1,269 Bofors RP4 ~approximation 110,7 1,72 838 92,4 366 56 1,269 Raufoss RA4 110,7 1,72 838 92,4 366 56 1,269 Vihtavuori N530 91,4 1,43 836 99,7 366 49 1,278 Norma 202 95,7 1,46 835 100,0 366 48 1,285 Norma 201 92,1 1,46 833 99,7 366 49 1,296 Vihtavuori N150 107,1 1,57 830 100,0 366 49 1,285 Vihtavuori N165 119,5 1,84 829 93,4 366 54 1,277 Vihtavuori N135 104,7 1,48 829 100,0 366 45 1,288 Vihtavuori N140 99,8 1,49 827 100,0 366 46 1,285 Vihtavuori N540 99,3 1,56 824 99,0 366 50 1,291 Vihtavuori N160 118,6 1,77 819 90,7 366 52 1,283 Bofors RP1/NP ~approximation 80,4 1,29 815 100,0 366 41 1,312 Norma 200 80,4 1,29 815 100,0 366 41 1,312 Vihtavuori N133 97,0 1,38 809 100,0 366 41 1,290 Vihtavuori N130 91,3 1,33 806 100,0 366 40 1,298 Norma MRP 2 120,0 1,86 792 86,3 285 59 1,408 Vihtavuori N120 85,8 1,22 789 100,0 366 36 1,307 Vihtavuori N110 75,3 0,99 755 100,0 366 31 1,330 Vihtavuori N170 120,0 1,84 735 76,3 262 49 1,491 Vihtavuori 24N41 120,0 1,99 733 68,8 297 49 1,435 Vihtavuori 3N38 65,1 0,82 706 100,0 366 25 1,356 Vihtavuori N105 65,5 0,80 699 100,0 366 24 1,376 Vihtavuori 20N29 120,0 2,01 630 60,2 195 42 1,720 Norma R1 76,7 0,60 608 100,0 366 18 1,462 Quote Link to comment Share on other sites More sharing options...
Kjell Olav Posted October 23, 2008 Share Posted October 23, 2008 Trond på hjemmelading.no selger Partizan 75 HPBT Match til ca kr 1 pr stk. En kule som har vist seg svært presis i flere 223 rifler. I min LTR fikk jeg en gruppe på 14,5mm på 200m og på 275m ga den en gruppe på 35mm. Har også brukt denne kulen til medium langhold 500 m med godt resultat. BC rundt .400 og 840 m/s. Til 75grn kulene bruker jeg N540 noe som gir bra hastighet, presisjon og fin fylling av hylsa. N550 har jeg ikke prøvd. Av dier bruker jeg Redding Body Die, Lee Collet og Forster BR kulesetter, en kombinasjon som har gitt lang levetid på hylsene og flott presisjon. Redding type S diesettet er sikkert minst like bra men koster noen kr mer. Quote Link to comment Share on other sites More sharing options...
M67 Posted October 24, 2008 Author Share Posted October 24, 2008 (edited) ----------------------------------------------------------------------- K Edited December 9, 2013 by Guest Quote Link to comment Share on other sites More sharing options...
338RUM Posted October 24, 2008 Share Posted October 24, 2008 Bushing diameteren kommer litt ann på hvilke hylser, og kuler du skal bruke. Det Redding (og endel andre) annbefaler er å måle en ladet patron med den kulen, og den hylsefabrikanten du skal bruke, for så å trekke ifra 0,001 til 0,003 tommer av dette målet. Noen mener en skal bruke minstemålet om en skal skyte mollykuler. Legger ved litt lesestoff om emnet nedenfor.... Next question what the heck is a size bushing? Redding produces a variety of neck size bushings from .185" to .340" in .001" increments. To me, they bear a very distinct resemblance to drill and fabrication bushings used in various industrial applications. A specific sized bushing (diameter is neatly etched in the top) is inserted into the neck size die after removing the stem assembly. The rule is to measure the neck of the loaded rounds and then subtract .002" to .003" from this diameter, giving what is hoped to be the optimal uniform fit of projectile, case neck and dynamic tension. Bushing Selectionfor Redding Bushing Style Neck Sizing Dies (Revised 3/3/2003) There has been some confusion regarding the correct diameter bushing that should be used with Redding Bushing Style Sizing Dies. The most common misconception is that the bushing diameter is determined by the neck diameter of fired cases or the neck diameter of the chamber that the reloaded ammunition will be fired in. The bushing diameter is related to the chamber neck diameter, but only indirectly, in that the loaded cartridges must have adequate clearance at the neck to allow the bullet to be released properly upon firing.* The easiest way to determine the proper diameter bushing is to measure the neck diameter of several loaded or dummy cartridges with an accurate micrometer. (These dummy cartridges can be loaded with your old set of dies or a borrowed set.) Then, simply subtract 0.001" from the cartridge that had the smallest average measurement. This will allow for a slight amount of spring back and create a proper press fit for the bullet. Another method of determining bushing size, is to measure the neck wall thickness of the cartridge cases with a ball type or tubing micrometer. Double this measurement and add the bullet diameter to calculate the neck diameter of a loaded cartridge. As above, subtract 0.001" from this figure to determine bushing size. This method is the least desirable of the two, as a ball micrometer is fairly expensive and more difficult to read consistently than a conventional micrometer. If you're starting with new cases, the neck wall thickness can be determined as above with a ball micrometer, or you can seat boat-tail bullets in a few cases and measure their neck diameter. Generally, the neck diameter of new cases is small enough to hold a bullet without sizing. As a last resort, you can measure the neck wall thickness of the cases with a caliper. Be aware that you may not select the correct bushing on the first try when using a caliper to measure neck wall thickness, due to the reduced measuring accuracy of the caliper. The above methods of determining bushing size require that the cases being sized have a fairly uniform neck wall thickness or have been neck turned. If the neck wall thickness varies more than 0.002", it may be necessary to use a bushing a couple of thousandths smaller than your calculations indicate, and then use a size button in the die to determine the final inside neck diameter. After loading your first few cartridges, it's a good idea to test the grip that the case neck is exerting on the bullet. The simplest method to perform this test is to press the tip of the loaded cartridge against the edge of your reloading bench with moderate pressure. The bullet should not be seated deeper in the case if you have sized at least one caliber of the case neck. If the bullet is seated deeper in the case, switch to the next smaller size bushing and start again. It has come to our attention through customer calls and our own use of the bushing style sizing dies that in certain instances, a given neck sizing bushing will produce a case neck diameter that can be several thousandths of an inch smaller than the actual diameter of the bushing. This idiosyncrasy occurs when the neck diameter of the fired case is a great deal larger than the diameter of the neck sizing bushing, such as occurs when factory chambers are on the large side of the tolerance range and the brass is on the thin side. Typically, we have not noticed any problems until the case neck is reduced more than 0.008-0.010". Solutions include, increasing bushing diameter to compensate and/or the use of a size button. Reducing the neck diameter in two smaller steps by using an intermediate diameter bushing will also help. More concentric necks will also result using this method, as the case necks are stressed less during sizing. Don't forget to properly chamfer the inside and outside of the case mouths and apply a light coating of lubricant to the case necks before sizing. To determine bushing range for standard calibers see "Bushing Range Chart" If you have any further questions, please feel free to call our technical support line. * We recommend that the neck diameter of the largest loaded cartridges measure at least 0.002-0.003" smaller than fired cases measured at the same location. This ensures that there is a clearance of at least 0.001-0.0015" all around the neck of the loaded cartridge. This clearance allows the case neck to expand and safely release the bullet upon firing. 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M67 Posted November 17, 2008 Author Share Posted November 17, 2008 (edited) ----------------------------------------------------------------------- K Edited December 9, 2013 by Guest Quote Link to comment Share on other sites More sharing options...
leoestby Posted November 21, 2011 Share Posted November 21, 2011 Hvilken bushing endte du på til lapua hylsene? Quote Link to comment Share on other sites More sharing options...
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