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Rifles, Reloading, Optics, Equipment
Reloading
7-08 or 284win
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<blockquote data-quote="tim_w" data-source="post: 2647450" data-attributes="member: 11132"><p>Use a rsaum case. Actually Rich Sherman's SST version of the rsaum is a better fit when considering bullet seating depth within the constrains of the ar10 mag. It has enough taper and shoulder angle for feeding / cycling.</p><p></p><p> Get a hi psi fp port mag bolt with dual ejector. Take 0.050 off the uppers ejection port to allow proper ejection. Unless you use a upper already designed with the larger port. Use a 24" barrel with a 16" gas port position especially with the use of the slower powders. Personally I would choose a CoMoly barrel vs SS. With gas port erosion and the ease to which it is to have unintentional high rates of fire vs bolt gun it will last longer and have lower rate of port erosion. Plus handle repeated high chamber pressures better.</p><p></p><p>You can load it from 7-08 perf levels thru well past 280 levels. It fits and feeds from AR-10 mags.</p><p></p><p></p><p>The far easiest would be to do a 7-08 but you will still be setting the longer bullets deep in the case to fit so it depends on your specific goals.</p><p></p><p>No way I would do a 284 std. unless you set the shoulder back to 7-08. You could leave a longer neck. I have never tried to feed that diameter case from a ar10 mag.</p></blockquote><p></p>
[QUOTE="tim_w, post: 2647450, member: 11132"] Use a rsaum case. Actually Rich Sherman's SST version of the rsaum is a better fit when considering bullet seating depth within the constrains of the ar10 mag. It has enough taper and shoulder angle for feeding / cycling. Get a hi psi fp port mag bolt with dual ejector. Take 0.050 off the uppers ejection port to allow proper ejection. Unless you use a upper already designed with the larger port. Use a 24" barrel with a 16" gas port position especially with the use of the slower powders. Personally I would choose a CoMoly barrel vs SS. With gas port erosion and the ease to which it is to have unintentional high rates of fire vs bolt gun it will last longer and have lower rate of port erosion. Plus handle repeated high chamber pressures better. You can load it from 7-08 perf levels thru well past 280 levels. It fits and feeds from AR-10 mags. The far easiest would be to do a 7-08 but you will still be setting the longer bullets deep in the case to fit so it depends on your specific goals. No way I would do a 284 std. unless you set the shoulder back to 7-08. You could leave a longer neck. I have never tried to feed that diameter case from a ar10 mag. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
7-08 or 284win
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