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Hunting
Long Range Hunting & Shooting
checking volume of brass
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<blockquote data-quote="Steve Sheasly" data-source="post: 1507166" data-attributes="member: 103826"><p>It is important to me to separate my once fired brass not by manufacturer or by weight (you can assume that I have done everything to the brass to make it uniform, concentric etc..) but by volume. assuming the case is in good shape and not abused volume is the only thing that will affect the accuracy. Weight is not volume and has zero effect on the powder burn characteristics threfore pressures. So lets just look at measuring volume.</p><p></p><p>I am using alcohol over live primers to measure volume. I have a methodology that has given me 100 percent repeatability for any specific case measured. My question is has anyone fired a primer that has been soaked in 70% isopropyl alcohol (yes I realize the other 30 percent is water) I did not have any 200 proof alcohol, I am awaiting an answer from CCI to see if this will damage their primers or not and for what type of non viscus liquid will work. I know this is a bit unOrthodox but if I can get repeatable volumes this way and the primers are not hurt it will keep me from having to machine a precision primer plug. I do not like the ones on the market besides it changes the volume (just a hair but it does change it) the primer used to fire the cartridge will be the saem on in the volume calc.</p></blockquote><p></p>
[QUOTE="Steve Sheasly, post: 1507166, member: 103826"] It is important to me to separate my once fired brass not by manufacturer or by weight (you can assume that I have done everything to the brass to make it uniform, concentric etc..) but by volume. assuming the case is in good shape and not abused volume is the only thing that will affect the accuracy. Weight is not volume and has zero effect on the powder burn characteristics threfore pressures. So lets just look at measuring volume. I am using alcohol over live primers to measure volume. I have a methodology that has given me 100 percent repeatability for any specific case measured. My question is has anyone fired a primer that has been soaked in 70% isopropyl alcohol (yes I realize the other 30 percent is water) I did not have any 200 proof alcohol, I am awaiting an answer from CCI to see if this will damage their primers or not and for what type of non viscus liquid will work. I know this is a bit unOrthodox but if I can get repeatable volumes this way and the primers are not hurt it will keep me from having to machine a precision primer plug. I do not like the ones on the market besides it changes the volume (just a hair but it does change it) the primer used to fire the cartridge will be the saem on in the volume calc. [/QUOTE]
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checking volume of brass
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