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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
338 Lapua Mag barrel
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<blockquote data-quote="AJ Peacock" data-source="post: 249691" data-attributes="member: 4885"><p>According to Quickload, using a 300SMK behind H-1000, your velocity drop from a 26" barrel to a 20" barrel is around 150fps. Most of the powder is burned by the 20" mark, but the barrel exit pressure is pretty high. The bad part of that will be a big muzzle blast, on the bright side, a brake will probably work really well <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" /></p><p></p><p>I've found that a high muzzle pressure can really magnify any problems with bullet bases/muzzle crowns.</p><p></p><p>My guess is that a 20"LM will probably top out less than 2550fps with a 300SMK</p><p></p><p>AJ</p></blockquote><p></p>
[QUOTE="AJ Peacock, post: 249691, member: 4885"] According to Quickload, using a 300SMK behind H-1000, your velocity drop from a 26" barrel to a 20" barrel is around 150fps. Most of the powder is burned by the 20" mark, but the barrel exit pressure is pretty high. The bad part of that will be a big muzzle blast, on the bright side, a brake will probably work really well :D I've found that a high muzzle pressure can really magnify any problems with bullet bases/muzzle crowns. My guess is that a 20"LM will probably top out less than 2550fps with a 300SMK AJ [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
338 Lapua Mag barrel
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