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Rifles, Reloading, Optics, Equipment
Reloading
headspace question
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<blockquote data-quote="ebsarg" data-source="post: 663460" data-attributes="member: 49635"><p>Thank you for all the responses!</p><p></p><p>RE: the lengths i measured relative to SAAMI specs, i bored a healthy chamfer on the leading edge of the aluminum adapter piece that beds against the case shoulder, so i'm not sure at what diameter it contacts the shoulder at, and therefor not sure where the point i am measuring is relative to the base of the cartridge. it was more a tool to see where the cases are relative to each other (so i could control the amount i was resizing). maybe i should make another at .420 to see how i compare to the spec (suspect my chambers are on the extreme short end?)</p><p></p><p>my goal is to bump the shoulders back just enough to ensure they don't get stuck in the chamber. this hasn't happened yet, never had a sticky bolt on open or close on either gun. so maybe i don't need to worry about it? my goal is to develop sub moa hunting loads for different bullet weights, not exactly high accuracy by the standards of some.</p><p></p><p>I fired the 7RM brass another time today (2x fired total) and it did not expand further, so i must have found the end of the chamber.</p><p></p><p>facing the shell holder back so i can get the brass further into the die is a good idea, i'll give that a try.</p><p></p><p>the bolts are engraved with the last 3 digits of the serial # so i'm confident the bolts in both guns are original. </p><p></p><p>if anyone else has encountered this apparent short chamber or long die situation i'd be interested to hear about it. </p><p></p><p>thanks for the ideas, i have a lot to learn</p></blockquote><p></p>
[QUOTE="ebsarg, post: 663460, member: 49635"] Thank you for all the responses! RE: the lengths i measured relative to SAAMI specs, i bored a healthy chamfer on the leading edge of the aluminum adapter piece that beds against the case shoulder, so i'm not sure at what diameter it contacts the shoulder at, and therefor not sure where the point i am measuring is relative to the base of the cartridge. it was more a tool to see where the cases are relative to each other (so i could control the amount i was resizing). maybe i should make another at .420 to see how i compare to the spec (suspect my chambers are on the extreme short end?) my goal is to bump the shoulders back just enough to ensure they don't get stuck in the chamber. this hasn't happened yet, never had a sticky bolt on open or close on either gun. so maybe i don't need to worry about it? my goal is to develop sub moa hunting loads for different bullet weights, not exactly high accuracy by the standards of some. I fired the 7RM brass another time today (2x fired total) and it did not expand further, so i must have found the end of the chamber. facing the shell holder back so i can get the brass further into the die is a good idea, i'll give that a try. the bolts are engraved with the last 3 digits of the serial # so i'm confident the bolts in both guns are original. if anyone else has encountered this apparent short chamber or long die situation i'd be interested to hear about it. thanks for the ideas, i have a lot to learn [/QUOTE]
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Reloading
headspace question
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