Is this normal??

S

solomonf8

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Just started reloading this week and noticed these marks on the brass after FL sizing. The first 10 rounds I didn't have these marks and all of them after do. The brass is new Lapua .260 rem brass. I'm using one shot case lube and new redding dies.
Kind of hard to see in the pictures but I'm sure someone will know what I'd mean and if it's normal. Thanks.
 
Some rifle chambers have circular grooves from the reamer cut. They aren't usuasully deep enough to hurt anything but the brass expands into them slightly on firing. When you FL size the die hits the high spots, making them a little brighter than the low spots. A brindle pattern emerges. It's subtle and fairly normal.
 
Use a shotgun cleaning mop attached to a drill add some J&B bore paste, automotive rubbing compound, Flitz polish etc. and polish the inside of your die.

After polishing don't use One Shot case lube, it is a dry film lube and your die should be broken in with a standard wet type lube.

After doing the above see if the marks on the resized cases disappear, if not you have a slightly rough chamber as Dogleg explained in his post above.
 
bigedp51 said:
Use a shotgun cleaning mop attached to a drill add some J&B bore paste, automotive rubbing compound, Flitz polish etc. and polish the inside of your die.

After polishing don't use One Shot case lube, it is a dry film lube and your die should be broken in with a standard wet type lube.

After doing the above see if the marks on the resized cases disappear, if not you have a slightly rough chamber as Dogleg explained in his post above.
Click to expand...


Ed's method is even better
 
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