Anyone running 115 dtacs in a 6xc (Impact Precision action)

DoubleOught-BMA

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Dec 18, 2018
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(cross posted in bolt action forum)

So- brand new rifle with virgin Norma brass. Curious what those of you with this configuration (Impact, Norma 6xc, barrel reamed with new gen reamer, 115 dtac) are running. My plan is to send some fired brass to Hornady so they can make me a modified case... but looking for a safe starting load. More specifically - a safe bullet seating distance. Thoughts on how to do this without my COAL gauge? Thanks!
 

canezach

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If I'm reading your post correctly, it looks like one of your questions is about finding the distance to your lands. I'm not familiar with the Impact, but I would assume it'll either have a bayonet style firing pin, like the Bighorn, or you'll have to disassemble the bolt like a Remington. Either way, once you have removed the firing pin, it's as simple as taking a piece of unprimed brass, seating the bullet long, seating the dummy round into the extractor, and feeling for resistance as you close the bolt. As the bullet engages the lands, you'll feel resistance, the bolt won't just fall closed, etc. As you seat the bullet deeper into the case (further away from the lands), you'll feel less and less resistance. When the bolt is practically going into battery on its own, start seating deeper by 0.001" (assuming you have a micrometer die). When the bolt completely goes into battery just from gravity alone, you'll know your bullet is not engaging the lands at all. Take your brass, measure your cartridge (preferably to the ogive), and there you go!

Edit: and it looks like @hookedonbrass beat me as I was typing
 
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DoubleOught-BMA

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Ok - that method looks like a winner. So- do I really need a firing pin removal tool or is this something I can do without it? I think the bolt is a rem 700 style (will verify). Thanks!
 

canezach

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Ok - that method looks like a winner. So- do I really need a firing pin removal tool or is this something I can do without it? I think the bolt is a rem 700 style (will verify). Thanks!
If it's like a 700 bolt, the firing pin removal tool is nice to have, but not necessary. You can remove the firing pin with an old shoelace or 550 cord

Here you go:
 

hookedonbrass

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May 16, 2018
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I’m not sure how the impacts work. I asked a buddy but he hasn’t ever had to remove his so he’s not 100% and my googlefu didn’t work.

Im Not sure if you need a tool, or if it’s like the bighorns where you just turn the cocking piece and it comes out