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Weatherby Magnum 7mm from other
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Site Supporter   Location: Deckerville Joined: Wed Jan 13, 2016 Posts: 2944 Real Name: Rob 
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Can I use 300 wby brass and make it into 7mm brass? Full length resize and from is all to do?
Same for going from 270 wby to 7mm? _________________ “The Democrats are playing you for a political chump and if you vote for them, not only are you a chump, you are a traitor to your race.”-Malcolm X |
| Thu Oct 27, 2016 12:54 pm |
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Site Supporter Location: Deckerville Joined: Wed Jan 13, 2016 Posts: 2944 Real Name: Rob
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I checked the case dimensions and 270 is almost exactly the same as 7mm. The 300 is slightly longer than 7mm so some trimming is in order.
_________________ “The Democrats are playing you for a political chump and if you vote for them, not only are you a chump, you are a traitor to your race.”-Malcolm X |
| Thu Oct 27, 2016 6:50 pm |
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Site Supporter  Location: Bigfork, MT (Formerly Sammamish, WA) Joined: Sun Feb 15, 2015 Posts: 97 Real Name: Michael Hallak
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SporkBoy wrote: I checked the case dimensions and 270 is almost exactly the same as 7mm. The 300 is slightly longer than 7mm so some trimming is in order. You've got it. Flaring the case will make your neck thin, you might have a bit more h2o capacity in that brass. Reducing the diameter will have the opposite effect. Keep this in mind while you work towards a book max load, but it's totally reasonable and functional. _________________ Visit http://www.vantagereloading.com/ for custom ammunition tuned for your firearm. |
| Thu Oct 27, 2016 8:39 pm |
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Site Supporter  Location: West Olympia Joined: Mon May 28, 2012 Posts: 6817 Real Name: Matt
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How much 7mm brass do you need?
_________________ "I'm Hub McCann. I've fought in two World Wars and countless smaller ones on three continents. I led thousands of men into battle with everything from horses and swords to artillery and TANKS! I've seen the headwaters of the Nile, and tribes of natives no white man had ever seen before. I've won and lost a dozen fortunes, KILLED MANY MEN! And loved only one woman, with a passion a FLEA like you could never begin to understand. That's who I am. NOW, GO HOME, BOY!" "I know not with what weapons World War III will be fought, but World War IV will be fought with sticks and stones". Albert Einstein 1947 |
| Thu Oct 27, 2016 10:34 pm |
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Site Supporter Location: Deckerville Joined: Wed Jan 13, 2016 Posts: 2944 Real Name: Rob
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mcyclonegt wrote: How much 7mm brass do you need? I just got 20 of the 270 and 20 of the 300. I'd like another 20 and that should hold me for a couple years. I don't shoot that rifle very much and I've already worked up several loads optimized for accuracy (very whippy barrel). Looking at another bullet to optimize and then just hunting. _________________ “The Democrats are playing you for a political chump and if you vote for them, not only are you a chump, you are a traitor to your race.”-Malcolm X |
| Fri Oct 28, 2016 5:39 pm |
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Site Supporter Location: Deckerville Joined: Wed Jan 13, 2016 Posts: 2944 Real Name: Rob
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I worked on a 300 case and got it down to the correct dimensions but the neck is too thick (OldJim called it - need to ream or turn down for proper thickness).
Also got some funky marks around the shoulder - looks sort of scalloped. I will fire form it and if the case shapes up then I'll do the other 19 pieces. _________________ “The Democrats are playing you for a political chump and if you vote for them, not only are you a chump, you are a traitor to your race.”-Malcolm X |
| Fri Oct 28, 2016 5:45 pm |
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Site Supporter Location: West Olympia Joined: Mon May 28, 2012 Posts: 6817 Real Name: Matt
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I got 20 of each ill trade you for a beer.
_________________ "I'm Hub McCann. I've fought in two World Wars and countless smaller ones on three continents. I led thousands of men into battle with everything from horses and swords to artillery and TANKS! I've seen the headwaters of the Nile, and tribes of natives no white man had ever seen before. I've won and lost a dozen fortunes, KILLED MANY MEN! And loved only one woman, with a passion a FLEA like you could never begin to understand. That's who I am. NOW, GO HOME, BOY!" "I know not with what weapons World War III will be fought, but World War IV will be fought with sticks and stones". Albert Einstein 1947 |
| Fri Oct 28, 2016 5:59 pm |
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Site Supporter Location: Deckerville Joined: Wed Jan 13, 2016 Posts: 2944 Real Name: Rob
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mcyclonegt wrote: I got 20 of each ill trade you for a beer. 20 7mm Weatherby magnum brass for a beer? How about home made hard apple cider? _________________ “The Democrats are playing you for a political chump and if you vote for them, not only are you a chump, you are a traitor to your race.”-Malcolm X |
| Fri Oct 28, 2016 6:30 pm |
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Site Supporter Location: West Olympia Joined: Mon May 28, 2012 Posts: 6817 Real Name: Matt
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Even better.
_________________ "I'm Hub McCann. I've fought in two World Wars and countless smaller ones on three continents. I led thousands of men into battle with everything from horses and swords to artillery and TANKS! I've seen the headwaters of the Nile, and tribes of natives no white man had ever seen before. I've won and lost a dozen fortunes, KILLED MANY MEN! And loved only one woman, with a passion a FLEA like you could never begin to understand. That's who I am. NOW, GO HOME, BOY!" "I know not with what weapons World War III will be fought, but World War IV will be fought with sticks and stones". Albert Einstein 1947 |
| Fri Oct 28, 2016 7:04 pm |
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Site Supporter Location: Deckerville Joined: Wed Jan 13, 2016 Posts: 2944 Real Name: Rob
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Huh, trimmed the 300 Why case down very close to 7mm Wby length. Full length resized with neck expander removed - neck OD is 0.307. Final trimmed to 2.545 ... will not chamber.
The shoulder looks to be in the wrong place (1.820 instead of 1.787). That's quite a lot of wrong. _________________ “The Democrats are playing you for a political chump and if you vote for them, not only are you a chump, you are a traitor to your race.”-Malcolm X |
| Fri Oct 28, 2016 8:17 pm |
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Site Supporter Location: Bigfork, MT (Formerly Sammamish, WA) Joined: Sun Feb 15, 2015 Posts: 97 Real Name: Michael Hallak
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SporkBoy wrote: Also got some funky marks around the shoulder - looks sort of scalloped. I will fire form it and if the case shapes up then I'll do the other 19 pieces. Sounds like the brass is relatively hard. You may need to anneal it. Wssm brass is that way as well, it's the only way to stretch a .223 neck to fit a .257 bullet _________________ Visit http://www.vantagereloading.com/ for custom ammunition tuned for your firearm. |
| Sat Oct 29, 2016 8:05 am |
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Site Supporter Location: Bigfork, MT (Formerly Sammamish, WA) Joined: Sun Feb 15, 2015 Posts: 97 Real Name: Michael Hallak
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SporkBoy wrote: Huh, trimmed the 300 Why case down very close to 7mm Wby length. Full length resized with neck expander removed - neck OD is 0.307. Final trimmed to 2.545 ... will not chamber. The shoulder looks to be in the wrong place (1.820 instead of 1.787). That's quite a lot of wrong. Try marking your neck with a sharpie and attempt to chamber again, then check the marks. It's worth noting if your shoulder is the issue or if it's actually another issue, as technically you can headspace on the belt or the shoulder with a belted magnum. I say technically just to not get into that debate right now. What kind of dies are you using? Is the 300 brass new or once fired? _________________ Visit http://www.vantagereloading.com/ for custom ammunition tuned for your firearm. |
| Sat Oct 29, 2016 8:07 am |
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Site Supporter Location: Deckerville Joined: Wed Jan 13, 2016 Posts: 2944 Real Name: Rob
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RCBS dies . New brass.
Very bizzare ... the sharpied case shows no marks. I jammed it really good and got the bolt to close. The case mouth is bent like it has pressed into something. Verified case length is a bit short. _________________ “The Democrats are playing you for a political chump and if you vote for them, not only are you a chump, you are a traitor to your race.”-Malcolm X |
| Sat Oct 29, 2016 10:41 am |
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Site Supporter Location: Deckerville Joined: Wed Jan 13, 2016 Posts: 2944 Real Name: Rob
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Tried another one ...
Still hard to chamber but now the case body crumpled ... You do not have the required permissions to view the files attached to this post. _________________ “The Democrats are playing you for a political chump and if you vote for them, not only are you a chump, you are a traitor to your race.”-Malcolm X |
| Sat Oct 29, 2016 12:53 pm |
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Site Supporter Location: Bigfork, MT (Formerly Sammamish, WA) Joined: Sun Feb 15, 2015 Posts: 97 Real Name: Michael Hallak
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can you post some more pictures? It's hard to see in the one you posted above.
_________________ Visit http://www.vantagereloading.com/ for custom ammunition tuned for your firearm. |
| Tue Nov 01, 2016 8:27 am |
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