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Rifles, Reloading, Optics, Equipment
Reloading
Need technical input: rifle project based on 7LRM cartridge necked to .277
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<blockquote data-quote="264MHC" data-source="post: 2023911" data-attributes="member: 111161"><p>If I were to take on this project, I would start with 300 PRC Brass from ADG. Lapua is supposedly introducing some shortly as well. That gives you 2 excellent sources and you will almost certainly be able to burn out a barrel with 100 pieces with proper care. Straight neck down to 277 could easily be accomplished with a 300 PRC bushing die with 3-4 step downs in bushing size and leave you with a .280ish neck. A Hornady seater die for 270 Weatherby should work as they are based on caliber and length, not individual cartridges. Make 3 dummy cases this way and seat your Preferred bullet with the boat tail junction about .03 above the neck-shoulder junction. Call Manson Reamers and send them the dummy rounds to make a custom reamer for about $200, heck of a deal in my opinion. Then start gathering components. 8 twist barrel finished at at least 26". Action/magazine combo that will accommodate 3.7"+ Coal, and a nice high end stock. When going to the trouble of creating your own wildcat, it's worth it to go all out on your components to have a gun you'll be proud of. Get it all together then the fun part begins with load development and seeing what you can get out of your new cartridge.</p></blockquote><p></p>
[QUOTE="264MHC, post: 2023911, member: 111161"] If I were to take on this project, I would start with 300 PRC Brass from ADG. Lapua is supposedly introducing some shortly as well. That gives you 2 excellent sources and you will almost certainly be able to burn out a barrel with 100 pieces with proper care. Straight neck down to 277 could easily be accomplished with a 300 PRC bushing die with 3-4 step downs in bushing size and leave you with a .280ish neck. A Hornady seater die for 270 Weatherby should work as they are based on caliber and length, not individual cartridges. Make 3 dummy cases this way and seat your Preferred bullet with the boat tail junction about .03 above the neck-shoulder junction. Call Manson Reamers and send them the dummy rounds to make a custom reamer for about $200, heck of a deal in my opinion. Then start gathering components. 8 twist barrel finished at at least 26”. Action/magazine combo that will accommodate 3.7”+ Coal, and a nice high end stock. When going to the trouble of creating your own wildcat, it’s worth it to go all out on your components to have a gun you’ll be proud of. Get it all together then the fun part begins with load development and seeing what you can get out of your new cartridge. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
Need technical input: rifle project based on 7LRM cartridge necked to .277
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