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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Hammer bullets
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<blockquote data-quote="RockyMtnMT" data-source="post: 1596426" data-attributes="member: 7999"><p>So I ran some numbers with the 186g .338 cal Sledge Hammer vs the 225g .338 cal Sledge Hammer. Using Hodgdon data the 186g should hit a top end load at ~2700fps and the 225g at ~2450fps in the .338 Federal.</p><p></p><p>186g SH @100y- impact vel=2473 fps Energy=2526 ft/lbs</p><p> @300y- impact vel=2053 fps Energy=1741 ft/lbs</p><p> 200y zero= 9" drop at 300y</p><p> Retained bullet weight will be 165g</p><p>225g SH @100y- impact vel= 2241 fps Energy= 2509 ft/lbs</p><p> @300y- impact vel= 1855 fps Energy= 1718 ft/lbs</p><p> Retained bullet weight will be 200g</p><p></p><p>If I were taking a 338 Federal for African plains game I would have it loaded with Sledge Hammers for the 90% weight retention. The choice between the 186g and the 225g are very close to each other for energy. The 186g has a slight edge here. Impact vel goes to the 186g for sure. The extra retained weight of the 225g will aid in deeper penetration. Maybe one of the math wizzes can chime in with momentum numbers.</p></blockquote><p></p>
[QUOTE="RockyMtnMT, post: 1596426, member: 7999"] So I ran some numbers with the 186g .338 cal Sledge Hammer vs the 225g .338 cal Sledge Hammer. Using Hodgdon data the 186g should hit a top end load at ~2700fps and the 225g at ~2450fps in the .338 Federal. 186g SH @100y- impact vel=2473 fps Energy=2526 ft/lbs @300y- impact vel=2053 fps Energy=1741 ft/lbs 200y zero= 9" drop at 300y Retained bullet weight will be 165g 225g SH @100y- impact vel= 2241 fps Energy= 2509 ft/lbs @300y- impact vel= 1855 fps Energy= 1718 ft/lbs Retained bullet weight will be 200g If I were taking a 338 Federal for African plains game I would have it loaded with Sledge Hammers for the 90% weight retention. The choice between the 186g and the 225g are very close to each other for energy. The 186g has a slight edge here. Impact vel goes to the 186g for sure. The extra retained weight of the 225g will aid in deeper penetration. Maybe one of the math wizzes can chime in with momentum numbers. [/QUOTE]
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