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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
8mm Thread
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<blockquote data-quote="mgood" data-source="post: 1110362" data-attributes="member: 91188"><p>My first attempt at drawing up a wildcat. . . . Ok, maybe not my <em>first</em> attempt, but the first one I saved and the first one I'm going to show anyone.</p><p>375 Ruger necked down to .323" and with the shoulder pushed back a little and steepened to 40 degrees. (I had to dust off some trigonometry to figure the measurements when I changed the angle.)</p><p></p><p><img src="http://img.photobucket.com/albums/v174/mgood1/8mm%20cat_zpskagji4cw.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p><p></p><p>Shoulder was moved back so that less bullet length will have to slither through the case neck. Tell me if that's a dumb idea. Maximum capacity was <em>not</em> the goal. (If it was, I'd make it more like elkaholic's 30/375 SI.) Just want a little more velocity than I'd get by necking down a 338 WinMag or necking up a 300 WinMag. I don't <em>have</em> to have 8mm Rem Mag performance, but being close is nice. Standard long-action 3.340 COAL, beltless case, near 8RM performance.</p><p></p><p>I'd love to hear your feedback.</p><p></p><p>ETA: 220 gr bullets. I had the Hawk in mind. It is relatively short for it's weight, at 1.177". I started with that and put the neck-to-shoulder angle 1.100" back from the 3.340" COAL so that very little of the bullet extends beyond the start of the shoulder. That's where I got the 2.240". From there I figured how far back a 40 deg shoulder would go to get out to .515". (That's where the trig came in. And rather than trying to remember opposite, adjacent, hypotenuse, blah, blah, blah, I used an online trig calculator.)</p></blockquote><p></p>
[QUOTE="mgood, post: 1110362, member: 91188"] My first attempt at drawing up a wildcat. . . . Ok, maybe not my [I]first[/I] attempt, but the first one I saved and the first one I'm going to show anyone. 375 Ruger necked down to .323" and with the shoulder pushed back a little and steepened to 40 degrees. (I had to dust off some trigonometry to figure the measurements when I changed the angle.) [IMG]http://img.photobucket.com/albums/v174/mgood1/8mm%20cat_zpskagji4cw.jpg[/IMG] Shoulder was moved back so that less bullet length will have to slither through the case neck. Tell me if that's a dumb idea. Maximum capacity was [I]not[/I] the goal. (If it was, I'd make it more like elkaholic's 30/375 SI.) Just want a little more velocity than I'd get by necking down a 338 WinMag or necking up a 300 WinMag. I don't [I]have[/I] to have 8mm Rem Mag performance, but being close is nice. Standard long-action 3.340 COAL, beltless case, near 8RM performance. I'd love to hear your feedback. ETA: 220 gr bullets. I had the Hawk in mind. It is relatively short for it's weight, at 1.177". I started with that and put the neck-to-shoulder angle 1.100" back from the 3.340" COAL so that very little of the bullet extends beyond the start of the shoulder. That's where I got the 2.240". From there I figured how far back a 40 deg shoulder would go to get out to .515". (That's where the trig came in. And rather than trying to remember opposite, adjacent, hypotenuse, blah, blah, blah, I used an online trig calculator.) [/QUOTE]
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