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Rifles, Reloading, Optics, Equipment
Rifles, Bullets, Barrels & Ballistics
Thinking of a .277 for new build?
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<blockquote data-quote="codyadams" data-source="post: 1768760" data-attributes="member: 87243"><p>I have played with two different .270 Shermans that we put together. H-1000 under a 170 EOL is going 2950 fps out of a 24.5" barrel. I prefer the .270 Sherman (as opposed to ss) because brass is cheaper and easier to find, and was super easy to make. Run a .270 case through a 30-06 die (just to expand to 30 cal, other 30 cal dies would work too) then run it up into a non-bushing 7mm rem mag die without the expander ball. Dump powder, seat bullets and go play to form brass. This creates a false shoulder, and when ran all the way up in the die, a standard 7mm rem mag die happens to place the shoulder perfectly for a crush fit, and because it is a non-bushing die that relies on the expander ball to size the neck, it sizes it down to .275 or so, just about right for seating .277 bullets. After the brass is formed you will need the .270 Sherman dies of course, but you can get started without them if you wanted if you have a few standard cartridge dies. Left is loaded round with false shoulder ready to form, and right is formed case. Made with a 30-06 sizer, 7mm rem mag sizer w/out expander, and standard .270 win seater die. Fun cartridge to play with!! And also, essentially no trimming thanks to the 40° shoulder.[ATTACH=full]160771[/ATTACH]</p></blockquote><p></p>
[QUOTE="codyadams, post: 1768760, member: 87243"] I have played with two different .270 Shermans that we put together. H-1000 under a 170 EOL is going 2950 fps out of a 24.5" barrel. I prefer the .270 Sherman (as opposed to ss) because brass is cheaper and easier to find, and was super easy to make. Run a .270 case through a 30-06 die (just to expand to 30 cal, other 30 cal dies would work too) then run it up into a non-bushing 7mm rem mag die without the expander ball. Dump powder, seat bullets and go play to form brass. This creates a false shoulder, and when ran all the way up in the die, a standard 7mm rem mag die happens to place the shoulder perfectly for a crush fit, and because it is a non-bushing die that relies on the expander ball to size the neck, it sizes it down to .275 or so, just about right for seating .277 bullets. After the brass is formed you will need the .270 Sherman dies of course, but you can get started without them if you wanted if you have a few standard cartridge dies. Left is loaded round with false shoulder ready to form, and right is formed case. Made with a 30-06 sizer, 7mm rem mag sizer w/out expander, and standard .270 win seater die. Fun cartridge to play with!! And also, essentially no trimming thanks to the 40° shoulder.[ATTACH=full]160771[/ATTACH] [/QUOTE]
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Thinking of a .277 for new build?
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