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Rifles, Reloading, Optics, Equipment
Reloading
7mm Remington Magnum dies
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<blockquote data-quote="sfdoc2000" data-source="post: 2181857" data-attributes="member: 76742"><p>I have been loading for over 50 years but have come up against a new problem. I have two 7mm Rem Mag rifles, one a custom 700 long action with a Bartlein barrel, the other, a factory Browning A-bolt. When I try to use cases that have been fired in the Rem 700 rifle (even with full length resizing in either RCBS or Forster dies), I cannot close the bolt on the Browning rifle. I know that belted magnums headspace on the belt, but here's the problem. The base to shoulder length of the fired cases checking with a Hornady headspace comparator. the rounds fired from the 700 even with full length resizing have too much base to shoulder length to allow the bolt to close on the Browning. In other words, the base to shoulder length is about 0.020 longer on the fired cases from the 700 than a new factory case (Norma brass). The only way I can reload for the Browning is to keep cases separate from the cases fired in the 700. It bothers me that the shoulder is not bumped back to SAAMI specs using either RCBS or Forster dies. </p><p>Maybe the gunsmith who chambered the Bartlein barrel made the shoulder depth about 0.020 deeper than a SAAMI spec chamber, I don't know since the headspace gauges for a 7mm Rem Mag only headspace for the belt, not the shoulder, so I can't actually measure the true chamber depth. I don't like the thought of rechambering the rifle. but maybe that may need to be done. </p><p>Does anyone know any other full length resizing dies that actually bump the shoulder back to SAAMI spec? I hate to try to buy multiple dies only to find they do the same as my RCBS or Forster dies. The other problem I also see here is the significant working of the brass to bump the shoulder back that far. Thoughts???</p><p>Doc Z</p></blockquote><p></p>
[QUOTE="sfdoc2000, post: 2181857, member: 76742"] I have been loading for over 50 years but have come up against a new problem. I have two 7mm Rem Mag rifles, one a custom 700 long action with a Bartlein barrel, the other, a factory Browning A-bolt. When I try to use cases that have been fired in the Rem 700 rifle (even with full length resizing in either RCBS or Forster dies), I cannot close the bolt on the Browning rifle. I know that belted magnums headspace on the belt, but here's the problem. The base to shoulder length of the fired cases checking with a Hornady headspace comparator. the rounds fired from the 700 even with full length resizing have too much base to shoulder length to allow the bolt to close on the Browning. In other words, the base to shoulder length is about 0.020 longer on the fired cases from the 700 than a new factory case (Norma brass). The only way I can reload for the Browning is to keep cases separate from the cases fired in the 700. It bothers me that the shoulder is not bumped back to SAAMI specs using either RCBS or Forster dies. Maybe the gunsmith who chambered the Bartlein barrel made the shoulder depth about 0.020 deeper than a SAAMI spec chamber, I don't know since the headspace gauges for a 7mm Rem Mag only headspace for the belt, not the shoulder, so I can't actually measure the true chamber depth. I don't like the thought of rechambering the rifle. but maybe that may need to be done. Does anyone know any other full length resizing dies that actually bump the shoulder back to SAAMI spec? I hate to try to buy multiple dies only to find they do the same as my RCBS or Forster dies. The other problem I also see here is the significant working of the brass to bump the shoulder back that far. Thoughts??? Doc Z [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Reloading
7mm Remington Magnum dies
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