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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
early pressure with tsx's
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<blockquote data-quote="splattermatic" data-source="post: 139570" data-attributes="member: 6781"><p><strong>early pressure with tsx\'s</strong></p><p></p><p>started some loads with my new 300 rum and am noticing somwthing.</p><p>i loaded 99.0 grains of reloader 25 behind the 168 gr tsx's and they looked fine, set at mag length.</p><p>then i tried another 5 at .20 off the lands, and had signs of high pressure.</p><p>accuracy was about the same, so i am thinking the free bore jump let's pressure spike and maintain low during the jump.</p><p>velocity was mid/high 3300's for the mag length, but over 3400 for the .20's.....</p><p>now fast forward to the other day.</p><p>i tried some 180 gr nab's, and started off at 98 gr's of reloader 25, and no pressure signs, fired the next 5 with 98.5 grains, and think this is all it can handle.</p><p>accuracy was good, all rounds at mag length, velocity was mid to high 3200 with 3 of the 98.5 loads just over 3300.</p><p></p><p>why can i load a 180 grainer to within a half grain of a 168 grainer ?</p><p>shouldn't the 168's be able to handle more powder than the 180's ??</p><p></p><p>i may be able to go a bit more with the 168's, but all this was shot at cool/cold tempts. summer heat may be another story.</p><p></p><p>do barnes develpoe high pressure sooner, than normal lead/copper bullets ?</p><p></p><p>what should i expect for a top velocity from the nab 180's with what powder ??</p><p></p><p>thanks all</p><p></p><p>fixed</p></blockquote><p></p>
[QUOTE="splattermatic, post: 139570, member: 6781"] [b]early pressure with tsx\'s[/b] started some loads with my new 300 rum and am noticing somwthing. i loaded 99.0 grains of reloader 25 behind the 168 gr tsx's and they looked fine, set at mag length. then i tried another 5 at .20 off the lands, and had signs of high pressure. accuracy was about the same, so i am thinking the free bore jump let's pressure spike and maintain low during the jump. velocity was mid/high 3300's for the mag length, but over 3400 for the .20's..... now fast forward to the other day. i tried some 180 gr nab's, and started off at 98 gr's of reloader 25, and no pressure signs, fired the next 5 with 98.5 grains, and think this is all it can handle. accuracy was good, all rounds at mag length, velocity was mid to high 3200 with 3 of the 98.5 loads just over 3300. why can i load a 180 grainer to within a half grain of a 168 grainer ? shouldn't the 168's be able to handle more powder than the 180's ?? i may be able to go a bit more with the 168's, but all this was shot at cool/cold tempts. summer heat may be another story. do barnes develpoe high pressure sooner, than normal lead/copper bullets ? what should i expect for a top velocity from the nab 180's with what powder ?? thanks all fixed [/QUOTE]
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early pressure with tsx's
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