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Rifles, Reloading, Optics, Equipment
Reloading
264 WM heavy bolt lift
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<blockquote data-quote="RT2506" data-source="post: 1184777" data-attributes="member: 10178"><p>Things I have learned. Retumbo is very sensitive near the max load. Even 0.2 grs more can go from no problem to ejector marks on the case and hard bolt lift. </p><p>The Nosler BT and AB ARE NOT THE SAME BULLET. The AB is a bonded bullet and thus it's core will react differently than the BT when the bullet hits the lands and it don't take much differences to cause pressure to spike when you are at and in your case OVER the listed MAX load in my Hodgdon data. My data list only the 140 Nosler partition but Max load is 63.5 grs Retumbo.</p><p>In my Rem 700 27 3/4" Shilen barrel 264 Win mag I use the 130 Accubond with WW cases made from 7mm Mags, CCI 250 primer and load 10 thousands off the lands and with 66.5 grs Retumbo and get 3350 fps and outstanding accuracy. When I did my work up there was no data listed for the 130 AB so I used the starting load for the Hornady 129 gr SP which list a Max load of 67.5 gr Retumbo. At 66.5 grs everything was was great but when I went to 67 grs I had very hard bolt lift and heavy ejector marks on the case with very flat primers. Did some more loads and found at 66.7 gr gave stiff bolt lift and slight ejector mark on the cases. But 66.5 gr works perfect with no problems even with temps in the 80s like it is often in east NC during deer season. </p><p>The advice of all the component makers of "Start at the starting load and work up if you change anything in a load" is sound advice. Just some things a crazy old man that has been loading for about 40 years has learned. <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite8" alt=":D" title="Big Grin :D" loading="lazy" data-shortname=":D" /> By the way, the Accubond is a super deer bullet for these speedsters that for me reacts the same from 30 to a little over 500 yards so far. Bullet enters destroys the vitals and exits with a quarter size hole and the deer goes FLOP on impact.</p></blockquote><p></p>
[QUOTE="RT2506, post: 1184777, member: 10178"] Things I have learned. Retumbo is very sensitive near the max load. Even 0.2 grs more can go from no problem to ejector marks on the case and hard bolt lift. The Nosler BT and AB ARE NOT THE SAME BULLET. The AB is a bonded bullet and thus it's core will react differently than the BT when the bullet hits the lands and it don't take much differences to cause pressure to spike when you are at and in your case OVER the listed MAX load in my Hodgdon data. My data list only the 140 Nosler partition but Max load is 63.5 grs Retumbo. In my Rem 700 27 3/4" Shilen barrel 264 Win mag I use the 130 Accubond with WW cases made from 7mm Mags, CCI 250 primer and load 10 thousands off the lands and with 66.5 grs Retumbo and get 3350 fps and outstanding accuracy. When I did my work up there was no data listed for the 130 AB so I used the starting load for the Hornady 129 gr SP which list a Max load of 67.5 gr Retumbo. At 66.5 grs everything was was great but when I went to 67 grs I had very hard bolt lift and heavy ejector marks on the case with very flat primers. Did some more loads and found at 66.7 gr gave stiff bolt lift and slight ejector mark on the cases. But 66.5 gr works perfect with no problems even with temps in the 80s like it is often in east NC during deer season. The advice of all the component makers of "Start at the starting load and work up if you change anything in a load" is sound advice. Just some things a crazy old man that has been loading for about 40 years has learned. :D By the way, the Accubond is a super deer bullet for these speedsters that for me reacts the same from 30 to a little over 500 yards so far. Bullet enters destroys the vitals and exits with a quarter size hole and the deer goes FLOP on impact. [/QUOTE]
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264 WM heavy bolt lift
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