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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Quickload 338 velocities
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<blockquote data-quote="Autorotate" data-source="post: 258502" data-attributes="member: 8073"><p>I'd like to ask your opinions on the estimates Quickload is spitting out to me for the calibers listed below and how they match up with reality.</p><p></p><p>My primary goal with this is not necessarily obtain "real world" velocity figures, but rather ensure I'm making proper assumptions in the "ranking" or order in how these calibers compare to each other velocity wise under a set of given parameters like barrel length, load density and chamber pressures. I realize individual barrels, chambers, etc will have a large factor in velocity variations between guns, even of the same caliber and chambered with the same reamer. </p><p></p><p>I find value with both of the following postings by Mr. Carlock and Mr. Kirby at the links below.</p><p></p><p><a href="http://www.longrangehunting.com/forums/f19/fastest-338-caliber-build-advice-33343/index3.html#post250907" target="_blank">http://www.longrangehunting.com/forums/f19/fastest-338-caliber-build-advice-33343/index3.html#post250907</a></p><p></p><p><a href="http://www.longrangehunting.com/forums/f19/fastest-338-caliber-build-advice-33343/index9.html#post252002" target="_blank">http://www.longrangehunting.com/forums/f19/fastest-338-caliber-build-advice-33343/index9.html#post252002</a></p><p></p><p></p><p>Again, I'm just wanting to ensure I'm making proper assumptions about the "jump" or potential difference in velocity between the different chamberings.</p><p></p><p>Quickload parameters:</p><p>28" barrel</p><p>300 grain SMK</p><p>103 to 90% load density</p><p>3.815 Overall Loaded Cartridge Length</p><p>SAAMI max pressure not exceeded</p><p></p><p><span style="color: Purple"><strong>338 Lapua</strong></span> (SAAMI reamer print)</p><p>116 grains of water to case overflow</p><p>2770-<span style="color: Purple"><strong>2840</strong></span> fps</p><p></p><p><span style="color: Blue"><strong>338 Lapua Improved</strong></span> (PTG reamer print)</p><p>126 grains of water to case overflow</p><p>2805-<span style="color: Blue"><strong>2885</strong></span> fps</p><p></p><p><span style="color: Red"><strong>338-378 Wby</strong></span> (SAAMI reamer print)</p><p>130 grains of water to case overflow</p><p>2815-<span style="color: Red"><strong>2890</strong></span> fps</p><p></p><p><strong><span style="color: Black">338-378 Kahn</span></strong>? (I don't have a reamer print...anyone care to share one?-PM me)</p><p><span style="color: Sienna"></span></p><p><span style="color: Sienna"><strong>338 Excalibur</strong></span> (A-Square/Manson reamer print)</p><p>138 grains of water to case overflow</p><p>2845-<span style="color: Sienna"><strong>2920</strong></span> fps</p><p></p><p>If something seems out of the ordinary, I'd appreciate your feedback and the "why" behind it.</p><p></p><p>I've got this posted at a few other forums, so if you see it there feel free to post up again. To me this is all about sharing knowledge and experience with others.</p><p></p><p>Thanks!</p><p></p><p>BTW-This all Broz's fault after his post of his Mark V Lapua<img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile :)" loading="lazy" data-shortname=":)" /></p></blockquote><p></p>
[QUOTE="Autorotate, post: 258502, member: 8073"] I’d like to ask your opinions on the estimates Quickload is spitting out to me for the calibers listed below and how they match up with reality. My primary goal with this is not necessarily obtain “real world” velocity figures, but rather ensure I’m making proper assumptions in the “ranking” or order in how these calibers compare to each other velocity wise under a set of given parameters like barrel length, load density and chamber pressures. I realize individual barrels, chambers, etc will have a large factor in velocity variations between guns, even of the same caliber and chambered with the same reamer. I find value with both of the following postings by Mr. Carlock and Mr. Kirby at the links below. [URL]http://www.longrangehunting.com/forums/f19/fastest-338-caliber-build-advice-33343/index3.html#post250907[/URL] [URL]http://www.longrangehunting.com/forums/f19/fastest-338-caliber-build-advice-33343/index9.html#post252002[/URL] Again, I'm just wanting to ensure I'm making proper assumptions about the "jump" or potential difference in velocity between the different chamberings. Quickload parameters: 28” barrel 300 grain SMK 103 to 90% load density 3.815 Overall Loaded Cartridge Length SAAMI max pressure not exceeded [COLOR=Purple][B]338 Lapua[/B][/COLOR] (SAAMI reamer print) 116 grains of water to case overflow 2770-[COLOR=Purple][B]2840[/B][/COLOR] fps [COLOR=Blue][B]338 Lapua Improved[/B][/COLOR] (PTG reamer print) 126 grains of water to case overflow 2805-[COLOR=Blue][B]2885[/B][/COLOR] fps [COLOR=Red][B]338-378 Wby[/B][/COLOR] (SAAMI reamer print) 130 grains of water to case overflow 2815-[COLOR=Red][B]2890[/B][/COLOR] fps [B][COLOR=Black]338-378 Kahn[/COLOR][/B]? (I don't have a reamer print...anyone care to share one?-PM me) [COLOR=Sienna] [B]338 Excalibur[/B][/COLOR] (A-Square/Manson reamer print) 138 grains of water to case overflow 2845-[COLOR=Sienna][B]2920[/B][/COLOR] fps If something seems out of the ordinary, I’d appreciate your feedback and the “why” behind it. I've got this posted at a few other forums, so if you see it there feel free to post up again. To me this is all about sharing knowledge and experience with others. Thanks! BTW-This all Broz's fault after his post of his Mark V Lapua:) [/QUOTE]
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