small copper shavings when seating bullet, what is going on? (6.5prc)

[Bigeclipse]

I am using Hornady brass which has been sized using a redding competition sizing die and Sinclair expanding mandrel die with carbide mandrel. I then trim, chamfer/debur. I noticed when seating bullets some of the brass was just barely shaving the nosler accubonds (6.5, 130 grain) I was seating(looked like tiny grains of sand). Is it my chamfer? I am using a hand chamfer/debur tool? Do I need more of a chamfer on the brass? Should I use a different tool? Any help would be appreciated.

 

[SteelBanger]

I once had a similar issue with my .357 load but never on a rifle cartridge, have you measured the case mouth opening to ensure it is sized correctly? How is the "feel" when seating the bullets? Smooth or forced? Have you pulled a bullet to compare the where the bullet shaving occurred compared to where it sat in the case? If not I would take a completed cartridge and put a marking on the bullet and case so you can line them back up after pulling the bullet and do a careful inspection of the case to see what might have caused it. Could also add a little more chamfer and see if that helps.

 

[milo-2]

One of the easiest ways to alleviate this is to buy a VLD chamfer tool, it gives a longer slope chamfer. And like the above poster alluded to, the smaller the diameter of the neck, the more it is magnified.
Brand of bullets play here too, pretty rare I have seen Berger bullets get shavings, yet Hornady, Sierra, seem to be more susceptible, no experience with Nosler.

 

[6.5-300 BEE]

VLD chamfer tool, if still shaving, larger mandrel.

 

[bigedp51]

Have your cases been wet tumbled?

 

[Bigeclipse]

Have your cases been wet tumbled?

Yes but I did my trim, chamfer/debur after the tumbling.

 

[Possum Cop]

I would measure the neck to see if the expander is to small. I would also measure the bullets just to make sure they are within specs.
The VLD chamfer tool would help.
Best of luck.

 

[Bigeclipse]

One of the easiest ways to alleviate this is to buy a VLD chamfer tool, it gives a longer slope chamfer. And like the above poster alluded to, the smaller the diameter of the neck, the more it is magnified.
Brand of bullets play here too, pretty rare I have seen Berger bullets get shavings, yet Hornady, Sierra, seem to be more susceptible, no experience with Nosler.

I googled VLD chamfer tool and several kinds came up. Any suggestions on which one to try?

 

[milo-2]

Personally, I like the RCBS model, tried the Lyman, did not seem right. I do not know if a carbide version is available from any mfr. I need a new one myself.

 

[loaders_loft]

I polish the case mouth with extra fine steel wool. I have a little 1/2" copper cap full of steel wool, with a screw and nut in one of the stations of my RCBS trim mate prep center. A couple seconds spinning smooths out the case mouth completely.

 

[Rflshootr]

I polish the case mouth with extra fine steel wool. I have a little 1/2" copper cap full of steel wool, with a screw and nut in one of the stations of my RCBS trim mate prep center. A couple seconds spinning smooths out the case mouth completely.

Or use a piece of scotch-brite on the table, put the mouth of the case on the pad and turn back and forth 2 or 3 times.

 

[fmuguira]

+1 to 6.5-300 Bee response

 

[Radman]

I am using Hornady brass which has been sized using a redding competition sizing die and Sinclair expanding mandrel die with carbide mandrel. I then trim, chamfer/debur. I noticed when seating bullets some of the brass was just barely shaving the nosler accubonds (6.5, 130 grain) I was seating(looked like tiny grains of sand). Is it my chamfer? I am using a hand chamfer/debur tool? Do I need more of a chamfer on the brass? Should I use a different tool? Any help would be appreciated.

Sometimes a flake of brass will show up because of an extractor.
I recently almost got rid of a FINE-shooting Winchester .270 because a bullet would only seat when loaded by hand and then it would not extract using the boat. After spending a little intimate time with it I found a teeny brass chip under the claw extractor, removed it, and it has been a great rifle ever since!

 

[Almondgrower]

K&M precision works very well for me ! It stays square by lining up threw flash hole and has a adjustable stop for consistency as long as Case length is consistent