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Rifles, Reloading, Optics, Equipment
Reloading
170 grain 27 Nosler Retumbo workup
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<blockquote data-quote="27 Gap" data-source="post: 2072402" data-attributes="member: 112073"><p>Comparing the 27 and 28 things get kind of weird despite a narrow barrel size difference and similar case capacities. If you look at the IMR 8133 loads for 150 grain bullets for both (published <a href="https://load-data.nosler.com/load-data/27-nosler/" target="_blank">here</a> and <a href="http://www.hodgdonreloading.com/data/rifle" target="_blank">here</a>) -- the 27 has a min/max of 73.5/77.5 while the 28 has a min/max of 78.7/85. Going to 30 Nosler you get min/max at 83/91C for the 150's.</p><p></p><p>For 175 grain loads of Retumbo, the Hodgdon's site has the min/max at 72.3/78. That's in line with what you have. The 30 Nosler does a 180 grain with Retumbo at 76/83.</p><p></p><p>If all of this works out, it looks like I should try running 73-ish grains as the min (like you suggested) and work up +.2 increments until I see pressure.</p></blockquote><p></p>
[QUOTE="27 Gap, post: 2072402, member: 112073"] Comparing the 27 and 28 things get kind of weird despite a narrow barrel size difference and similar case capacities. If you look at the IMR 8133 loads for 150 grain bullets for both (published [URL='https://load-data.nosler.com/load-data/27-nosler/']here[/URL] and [URL='http://www.hodgdonreloading.com/data/rifle']here[/URL]) -- the 27 has a min/max of 73.5/77.5 while the 28 has a min/max of 78.7/85. Going to 30 Nosler you get min/max at 83/91C for the 150's. For 175 grain loads of Retumbo, the Hodgdon's site has the min/max at 72.3/78. That's in line with what you have. The 30 Nosler does a 180 grain with Retumbo at 76/83. If all of this works out, it looks like I should try running 73-ish grains as the min (like you suggested) and work up +.2 increments until I see pressure. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
170 grain 27 Nosler Retumbo workup
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