how to make case mouth round without expender ball?

[BryanWang]

I have 6BR repeater, 100% of the case's mouths are dent because of ejector. how to get it back to round without a expender ball of the redding die?

thanks

 

[Dennis Sorensen]

I don't think you will make it round unless you run some kind of ball into it...

... but fix your ejector spring, it does not need to be that heavy...

 

[Dick Grosbier]

Its like Dennis said. You are going to have to put something inside to push it back out expander ball, a mandrel or something else there really is no other simple way

 

[John Kielly]

Back then, we used to drop a phillips screwdriver into the neck & sort of roll it out again. If you wanted to be fancy, you'd grind the head round so it didn't chew up the case head & flash hole.

 

[mikecr]

http://www.sinclairintl.com/cgi-bin/category.cgi?category=RECPNT&item=NT-EXP&type=store

 

[Boyd Allen]

Benchrest has grown up around the mantra that expander balls are bad. When they are part of a standard, one piece die, with an excessively small neck ID this is true because the pull required to drag the expander through an excessively sized neck will cause the brass to yield at the case shoulder resulting in a cocked neck and a crooked loaded round.

If one is able to closely match the ID that sizes of the neck with brass thickness and the desired OD of the neck, very little resistance is felt as an expander ball is pulled back through the neck, and the shoulder does not yield, nor the neck cock. The only other thing that might need attending to is the diameter of the expander so as to leave the desired amount of neck tension.

Also the point about your ejector spring was correct, and if you are using a tight neck, you might want to go to a reamer that has the largest neck that will clean up and still give the chamber clearance that you are looking for. Thicker necks dent less easily.

 

[MColeman]

One simple way is to simply insert a bullet into the case point first. If the necks are thin they will straighten very easily. You may have to tap the bullet slightly but then you can pull it back out with a bullet puller that the benchresters use.