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Is the cut mark on my first pic what you are referring to? Or something different again



Rounds were all single fed. I sorted through all the brass by length and took all the trimmers out and...

Thanks a bunch everyone for the input and advice.

I'll give it a good scrub out anyway.
Still worries me that diagonal gauge in the pill if it's not the rifling. Thinking back, it's definitely...

I did read/watch that after multiple neck sizing you'd have to fl size it to re fit the chamber. Didn't expect it so soon tbh

Yea sounds like FL size is the way to go, after watching Mr cortinas vids and hearing your guys thoughts on it seems like a no Brainer. I felt like when I started reloading it seemed like everything...

Usually screw the neck die down until it just touched the shell holder. Should I potentially be backing it off more?

So would the head space gauge be the best bet to figure out the bomb size problem? I'm ordering one for another caliber so might aswell grab another

Cycled some unloaded brass that's been resized from the same batch and there was a wee bit of resistance in some of them

That vivid I used last made the bugger rather hard to eject

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No but I have brass that is same batch unloaded sitting there

Also the dirty bastard took a nose dive into the concrete as I was cycling it hence the deformed tip

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Second time I've loaded from same box of eldx

I should note that these are first loads shot of the 3rd loading

Rifles has fires around 200 rounds first time I've had this issue.
Would the burr explain the issues around the jamming and stiff closing opening but only on these few rounds

Notsure if that helps much gents

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Just the 1 deep gauge like in pic but there is a bit of scuffing and tiny dents around the projectile

Yea I was thinking along these lines of shoulder bump issue. Is the only way to really figure this out with a headspace gauge for the comparator?

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Ok jammed causing the high pressure males sense to me

Na no signs of pressure and were 2grns lower than max load in hornady manual. rounds were tight to chamber and leaving rifling marks on the projectiles.
Rifle is a fierce 24inch 7mmRM, rounds are...

Evening guys, ran into a problem this afternoon with a few rounds jamming into the rifling. I rechecked the coal and ojive measurements and they match near perfect with the rounds that are chambering...