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Posted: 3/14/2012 6:37:25 PM EDT
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Im trying to follow the instructions below from this thread:
http://www.ar15.com/forums/t_6_42/324360_What_most_will_need_to_start___Reloading_Equipment_List_for_Precision___Match_Ammo.html "The second method requires a case fired out of THAT gun. This is where the Sinclair shoulder bump gauge comes into play. Install the shoulder bushing into the body and then install the body on one of the caliper jaws. Place the fired case in the calipers and zero the calipers. You can also note the length before zeroing for information sake. This fired case represents the total headspace in THAT chamber with THAT bolt and THAT bolt carrier in THAT upper receiver. Start over with the sizing die and an unsized case (but not the fired one). Move the die down until the sized case is 0.001 to 0.002 LESS than the fired case. Personally, I would go with 0.002, its up to you. Test setting with yet another unsized case." unfortunately i wasnt following the above instruction at the time i was setting up, and resized about 150 cases of 223 using the suggested method outlined in my lee single stage. Lee suggests raising the shellholder and tightening the die untill it contacts the shellholder, then tighten down an additional 1/4 turn. the results from about 20 cases using the shoulder bump gauge, on fired in my gun, not resized cases, was a headspace length of 1.431". then checking my improperly sized brass i measured 1.424" which is .007" smaller than my chamber  . Is this brass now unsafe to reload and shoot? if im not being clear let me know.
Thanks |
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Compare with some new .223 rounds before you get too excited
.007 is a bit too much, and will cause the brass to stretch more than desirable It may also result in a blown primer from the extra headspace. Other than that I can't think of a major failure as a result |
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Quoted:
Compare with some new .223 rounds before you get too excited .007 is a bit too much, and will cause the brass to stretch more than desirable It may also result in a blown primer from the extra headspace. Other than that I can't think of a major failure as a result thanks, actually didnt check that... its now the same size as an unfired round in the same brass. next time i'll just take it easier before resizing 
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