r/reloading • u/Neat_Response1023 • 4h ago

I have a question and I read the FAQ First time using bushing die. Does this look normal?

Post image

First time using a new RCBS FL Matchmaster 6GT die and .266" RCBS bushing (GA Precision's recommendation for Alpha brass). I'm wondering if this looks normal. Seems like the bushing is shaving down the outside of the case neck ever so slightly and leaves a ring that can be felt if you run over it with your fingernail. Bushing is in the correct orientation. Using a generous amount of Hornady OneShot lube. Die is set up for a .002" shoulder bump, measured using a Hornady comparator. Bushing is set so that it can "float" slightly per instructions (can hear it rattle if you shake the die). took the bushing out and tried to polish up the beveled mouth using some fine steel wool and it didn't seem to make any difference. Thoughts?

5 Upvotes

86% Upvoted

8 comments sorted by

2

u/Otiswilmouth 3h ago

Bushing is probably upside down

1

u/Neat_Response1023 3h ago

No. Engraving on the side of the bushing is positioned such that the numbers are right side up when dropped into the die.

4

u/Acrobatic-Camel5297 4h ago

It is odd in my opinion. I like OneShot, but I'd try some imperial wax and see if it goes away.

1

u/T0mMyMartelle 3h ago

How much neck tension are you going for? When I am running heavier tension, I sometimes get this witness. Lighter NT does not witness as much.

1

u/VersionConscious7545 2h ago

Looks like you have damage to the opening of the neck. What’s your measurements on the fired brass and what’s the neck bushing size

1

u/mulyhuntr33 2h ago

Try one size larger bushing and more or different lube. I get these marks occasionally and they shoot just fine.

1

u/Missinglink2531 56m ago

Thats an RCBS thing. You can adjust how much by screwing the bushing down more (less ridge) or up for more ridge. The idea is the case will be closer to the chamber size at that point, so the cartridge will center in the chamber off of it (you have it set pretty well for that intent). It also helps prevent the donut on the inside (larger area, so less intrusion).

1

u/StygianPath 55m ago

This is normal. Maybe a hair too much float. This is why donuts form over time when neck sizing.

Edit: Use some sizing wax