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Rifles, Reloading, Optics, Equipment
Reloading
7LRM clean up
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<blockquote data-quote="P7M13" data-source="post: 1938039" data-attributes="member: 94154"><p>You say 7mm Mashburn, but are you really thinking about the <a href="https://www.ballisticstudies.com/Knowledgebase/7mm+Practical.html" target="_blank">7mm Practical</a> (see link in the name)? Also consider the 7 STW, for which you can easily find brass and loaded ammo.</p><p>None of those should require a setback. Anything else probably will. You might want to consider setback anyway to eliminate any throat erosion you have from your 7 mag. If you give yourself a longer lede, you can run higher pressures too.</p><p>You might also want to look at the 7mm Shehane, a wildcat by the legendary <a href="http://scopeusout.com/" target="_blank">Bill Shehane</a>.</p><p>----</p><p>I remember going through all the research when I was going to switch my 300 RUM. Settled on the LRM. I already had a 7 Rem Mag, but had the "wildcat bug" and all my spent 300 RUM brass was going into my 338 Edge. The first thing I did was sort out brass availability. I had already read complaints about their brass on the web, so looked into making my own. Found it was not hard, just laborious. Then I set about building the rifle. I bided my time and got everything but the barrel on sale for $1,200. Valuing the donor rifle at $500, $1,700 all in.</p><p>McGowen 26" 1:8 | MDT Tac21 Chassis | Luth AR MBA1 stock (already had) | Timney trigger | AICS 3.715" Magazine | MB&M 4 port brake. My only regret is picking too heavy of a profile, 13# with glass. However, when I shoot with buddies, it's the one they want me to bring. They get a kick out of exploding coke cans at 500 yards.</p><p>I'm on my 4th loading of brass, which puts me at ~450 rounds so far. Some of the GW brass started splitting necks after 2 loadings. I haven't had any loose primers yet. I have no clue why the brass I've made by converting Hornady 375 Ruger brass performs better than the Hornady made GW brass. It just does.</p><p>I haven't scoped my throat because it still shoots sub-MOA, though it might be good to have a baseline picture.</p><p></p><p>In hindsight, would I do it again? Heck yes! The things I learned doing this are priceless. Besides, it's my hobby, and I'm not looking for a return on my investment. If I had put that money into Bitcoin instead, I'd be sitting on several million dollars. <img class="smilie smilie--emoji" loading="lazy" alt="🙄" title="Face with rolling eyes :rolling_eyes:" src="https://cdn.jsdelivr.net/joypixels/assets/8.0/png/unicode/64/1f644.png" data-shortname=":rolling_eyes:" /></p><p></p><p>Some info for you:</p><p>[ATTACH=full]202662[/ATTACH]</p><p></p><p>[ATTACH=full]202663[/ATTACH]</p><p></p><p>[ATTACH=full]202664[/ATTACH]</p><p></p><p></p><p>I heard all the nay-saying too, like "why would you want to spend money to build what can be done better with a 7 Mag?" To that, I can confirm the 7 Mag cannot do it better, and because I wanted to build another rifle.</p><p>I was struck by your comment above and took the time to look up your thread, <a href="https://www.longrangehunting.com/threads/school-me-on-the-7-lrm.198690/" target="_blank">https://www.longrangehunting.com/threads/school-me-on-the-7-lrm.198690/</a> -- it seems your last post excerpt below doesn't bear that same info. I don't believe in bashing a cartridge. The Hornady made GW brass sucks, I'll give you that. I find the cartridge a winner.</p></blockquote><p></p>
[QUOTE="P7M13, post: 1938039, member: 94154"] You say 7mm Mashburn, but are you really thinking about the [URL='https://www.ballisticstudies.com/Knowledgebase/7mm+Practical.html']7mm Practical[/URL] (see link in the name)? Also consider the 7 STW, for which you can easily find brass and loaded ammo. None of those should require a setback. Anything else probably will. You might want to consider setback anyway to eliminate any throat erosion you have from your 7 mag. If you give yourself a longer lede, you can run higher pressures too. You might also want to look at the 7mm Shehane, a wildcat by the legendary [URL='http://scopeusout.com/']Bill Shehane[/URL]. ---- I remember going through all the research when I was going to switch my 300 RUM. Settled on the LRM. I already had a 7 Rem Mag, but had the "wildcat bug" and all my spent 300 RUM brass was going into my 338 Edge. The first thing I did was sort out brass availability. I had already read complaints about their brass on the web, so looked into making my own. Found it was not hard, just laborious. Then I set about building the rifle. I bided my time and got everything but the barrel on sale for $1,200. Valuing the donor rifle at $500, $1,700 all in. McGowen 26" 1:8 | MDT Tac21 Chassis | Luth AR MBA1 stock (already had) | Timney trigger | AICS 3.715" Magazine | MB&M 4 port brake. My only regret is picking too heavy of a profile, 13# with glass. However, when I shoot with buddies, it's the one they want me to bring. They get a kick out of exploding coke cans at 500 yards. I'm on my 4th loading of brass, which puts me at ~450 rounds so far. Some of the GW brass started splitting necks after 2 loadings. I haven't had any loose primers yet. I have no clue why the brass I've made by converting Hornady 375 Ruger brass performs better than the Hornady made GW brass. It just does. I haven't scoped my throat because it still shoots sub-MOA, though it might be good to have a baseline picture. In hindsight, would I do it again? Heck yes! The things I learned doing this are priceless. Besides, it's my hobby, and I'm not looking for a return on my investment. If I had put that money into Bitcoin instead, I'd be sitting on several million dollars. 🙄 Some info for you: [ATTACH type="full" alt="1594284217643.png"]202662[/ATTACH] [ATTACH type="full" alt="1594284251738.png"]202663[/ATTACH] [ATTACH type="full" alt="1594284437990.png"]202664[/ATTACH] I heard all the nay-saying too, like "why would you want to spend money to build what can be done better with a 7 Mag?" To that, I can confirm the 7 Mag cannot do it better, and because I wanted to build another rifle. I was struck by your comment above and took the time to look up your thread, [URL]https://www.longrangehunting.com/threads/school-me-on-the-7-lrm.198690/[/URL] -- it seems your last post excerpt below doesn't bear that same info. I don't believe in bashing a cartridge. The Hornady made GW brass sucks, I'll give you that. I find the cartridge a winner. [/QUOTE]
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