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Rifles, Reloading, Optics, Equipment
Gunsmithing
Reamer design for 338 Norma Mag for 250gr Berger
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<blockquote data-quote="Machann" data-source="post: 774115" data-attributes="member: 36448"><p><span style="color: black"><span style="font-family: 'Verdana'"><span style="color: black"><span style="font-family: 'Verdana'">JEC I would consider +50 years of experience a expert<img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile :)" loading="lazy" data-shortname=":)" />.</span></span></span></span></p><p> <span style="color: black"><span style="font-family: 'Verdana'"></span></span></p><p><span style="color: black"><span style="font-family: 'Verdana'"><span style="color: black"><span style="font-family: 'Verdana'">The amount of experience you guys are blessed with over there is huge compared to what we have over and thanks for sharing. We don't have the powder over here to push the 300gr bullets fast enough, will be able to get 2650fps max out of the 300gr vs. 2950fps on the 250gr. That is a 7MOA drop difference at 1500m. </span></span></span></span></p><p> <span style="color: black"><span style="font-family: 'Verdana'"></span></span></p><p><span style="color: black"><span style="font-family: 'Verdana'"><span style="font-size: 12px"><span style="font-family: 'Calibri'">I'm looking to build this rifle as accurately as possible. An old bench rest legend over here designs all his reamers so the bullet kisses the lands with the base of bullet bearing surface between 0.02-0.07 above the intersection of the case neck and shoulder. Thus my thinking behind the reamer design. If you seat the Berger 250gr correctly you have close to a +0.22 jump in a chamber designed for the 300gr Berger kissing the lands. Is this too much jump to get optimum accuracy out of the rifle?</span></span></span></span></p><p><span style="color: black"><span style="font-family: 'Verdana'"></span></span></p><p> </p></blockquote><p></p>
[QUOTE="Machann, post: 774115, member: 36448"] [COLOR=black][FONT=Verdana][COLOR=black][FONT=Verdana]JEC I would consider +50 years of experience a expert:).[/FONT][/COLOR] [COLOR=black][FONT=Verdana] [/FONT][/COLOR] [COLOR=black][FONT=Verdana]The amount of experience you guys are blessed with over there is huge compared to what we have over and thanks for sharing. We don't have the powder over here to push the 300gr bullets fast enough, will be able to get 2650fps max out of the 300gr vs. 2950fps on the 250gr. That is a 7MOA drop difference at 1500m. [/FONT][/COLOR] [FONT=Calibri][SIZE=3] [/SIZE][/FONT] [SIZE=3][FONT=Calibri]I’m looking to build this rifle as accurately as possible. An old bench rest legend over here designs all his reamers so the bullet kisses the lands with the base of bullet bearing surface between 0.02-0.07 above the intersection of the case neck and shoulder. Thus my thinking behind the reamer design. If you seat the Berger 250gr correctly you have close to a +0.22 jump in a chamber designed for the 300gr Berger kissing the lands. Is this too much jump to get optimum accuracy out of the rifle?[/FONT][/SIZE] [/FONT][/COLOR] [COLOR=black][FONT=Verdana][/FONT][/COLOR] [COLOR=black][FONT=Verdana][/FONT][/COLOR] [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Gunsmithing
Reamer design for 338 Norma Mag for 250gr Berger
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