Neck sizing.

[186 tmanbuckhunter]

I've always bought a necksizer die with all of my die sets when I buy dies for my military surpluls rifles to prolong the life of my brass in those fire-arms, but I've often wondered, is neck sizing even necessary with a brand new fire-arm with a tight chamber, or a custom built rifle? Just curious because neck sizer dies aint cheap. lol

[Dill45]

The problem I've found is the neck just doesn't have enough tension in it to keep the bullet in place.

But I'm no master on the issue, that's just what I've found.

[186 tmanbuckhunter]

I don't have any problems with that.

[luvalever]

i like to necksize because you get a tad bit more case capacity. you can squeeze a miniscule amount of muscle withought pressure issues. if its a high capacity cartridge your loading it can be somewhat substantial. less case trimming. another added advantage is no lube is required, and longer brass life, that is a cost savings right there. if your using lee collet dies, you can polish the mandrel and get tighter necks for bullets with no cannalure or crimp.

[luvalever]

The problem I've found is the neck just doesn't have enough tension in it to keep the bullet in place.

But I'm no master on the issue, that's just what I've found.

lee collet dies allow you to polish the mandrel and 1 thousanth of an inch less than the way it came and whalla, tight necks.

[Dill45]

The Lee neck dies make it pretty tight as is. But if I just go out and shoot a round off and try to reload it without any resizing, the neck doesn't have enough tension to hold the bullet in place and it just falls through.

[luvalever]

The Lee neck dies make it pretty tight as is. But if I just go out and shoot a round off and try to reload it without any resizing, the neck doesn't have enough tension to hold the bullet in place and it just falls through.

well dude, you must resize the neck after every fireing. also measure length after every fireing.
once the bullet leaves the case, the neck becomes part of the expansion chamber and the neck expands to the chamber wall.

[186 tmanbuckhunter]

i like to necksize because you get a tad bit more case capacity. you can squeeze a miniscule amount of muscle withought pressure issues. if its a high capacity cartridge your loading it can be somewhat substantial. less case trimming. another added advantage is no lube is required, and longer brass life, that is a cost savings right there. if your using lee collet dies, you can polish the mandrel and get tighter necks for bullets with no cannalure or crimp.

YEah, the trimming is about the only advantage I've seen for me though. I still lube the inside of the case necks when neck sizing. I use RCBS and Lyman necksizers.

[Dill45]

well dude, you must resize the neck after every fireing. also measure length after every fireing.
once the bullet leaves the case, the neck becomes part of the expansion chamber and the neck expands to the chamber wall.

I must have missed the point of the thread...because that's what I was getting at. I thought the original question was around just sizing the neck vs. not sizing the neck.

My mistake.

[186 tmanbuckhunter]

I must have missed the point of the thread...because that's what I was getting at. I thought the original question was around just sizing the neck vs. not sizing the neck.

My mistake.

That's the whole point of sizing the neck. To not re-set the shoulder so the case doesn't lengthen, and to only size the neck back down a few thousanths under the bullet diameter.