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Rifles, Reloading, Optics, Equipment
Gunsmithing
300 RUM saami min headspace to datum line?
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<blockquote data-quote="grit" data-source="post: 647067" data-attributes="member: 4112"><p>Frustrating from here. It'd take a minute to diagnose in hand. Sometimes, a reamer flute will pack full of chips and stick to the side, tearing a gouge around the chamber. When you fire, brass could flow into this and make the brass sticky. You would see evidence on your brass.</p><p> </p><p>I'm wondering how much extraction cam is active. The extraction cam is a shortcoming of the 700. If your smith had to take much to true the lug abutments and bolt lugs, this can minimize the amount of extraction cam left working.</p><p> </p><p>I polish in the lathe, after chambering. You could use a drill and a dowel. 320 grit is as fine as you want to go. Tape one end of your paper to the dowel, wrap the dowel until it's near chamber size. A bit of toilet paper sandwiched could provide a little cushion. You don't want it tight. The end of the paper will flap out and polish. Use some WD-40 for lube. Wet the paper and the chamber.</p><p> </p><p>Just spin it for a bit. You just want to polish, not open things up.</p></blockquote><p></p>
[QUOTE="grit, post: 647067, member: 4112"] Frustrating from here. It'd take a minute to diagnose in hand. Sometimes, a reamer flute will pack full of chips and stick to the side, tearing a gouge around the chamber. When you fire, brass could flow into this and make the brass sticky. You would see evidence on your brass. I'm wondering how much extraction cam is active. The extraction cam is a shortcoming of the 700. If your smith had to take much to true the lug abutments and bolt lugs, this can minimize the amount of extraction cam left working. I polish in the lathe, after chambering. You could use a drill and a dowel. 320 grit is as fine as you want to go. Tape one end of your paper to the dowel, wrap the dowel until it's near chamber size. A bit of toilet paper sandwiched could provide a little cushion. You don't want it tight. The end of the paper will flap out and polish. Use some WD-40 for lube. Wet the paper and the chamber. Just spin it for a bit. You just want to polish, not open things up. [/QUOTE]
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Rifles, Reloading, Optics, Equipment
Gunsmithing
300 RUM saami min headspace to datum line?
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