Author Topic: inside neck dimensions (Read 477 times)

josebd · « **on:** December 09, 2003, 01:49:48 PM »

what would be the minimum inside neck demension for a .223? is .217 ok?after resizing!!!

jgalar · « **Reply #1 on:** December 09, 2003, 01:50:52 PM »

as long as you can seat the bullet it should be.

josebd · « **Reply #2 on:** December 09, 2003, 01:52:25 PM »

what would be the least?

jgalar · « **Reply #3 on:** December 09, 2003, 02:01:38 PM »

Have no idea, the bullet will expand the neck as it is inserted or the case will buckle. The case necks can thicken from shooting and resizing causing high pressures because the bullet can t release easily when fired. If you are concerned see if a bullet will easily fit before sizing. If a bullet wont fit in a fired case its a pretty good sign that the neck is to thick. Many times a lead bullet seated in a case that is sized for a jacket bullet will have a bulge where the bullet is in the case. As long as the cartridge will chamber it is ok.

I dont know if any of this is what you are looking for...

josebd · « **Reply #4 on:** December 09, 2003, 02:11:03 PM »

just wondering how tight it should fit,are you supposed to be able to put the bullet in by hand with little resistance or a tighter fit?

jgalar · « **Reply #5 on:** December 09, 2003, 02:14:20 PM »

The only sized and unloaded case that I have at the moment is a 303 british. The inside of the neck is 309 and the normal nominal bullet diameter is 312. I load gas checked bullets that are sized to 314 without any problems. So that is not far from what you have.

jgalar · « **Reply #6 on:** December 09, 2003, 02:17:12 PM »

On a fired case the bullet should be able to drop through. After sizing it is a press or interference fit. No, you shouldn't be able to just push the bullet in.

Iowegan · « **Reply #7 on:** December 09, 2003, 05:18:55 PM »

The ideal size for the expander ball in your sizing die is .223 for a .224 bullet. After the expander ball is pulled through the neck, the brass springs back a thousandth or so leaving the I.D. about .222". This will require some pressure to seat the bullet. When seating a bullet, anything tighter than .221 will cause the case to squat or leaves the bullet with a deep seating ring. This will make it chamber very tight in the gun.

If you are using the ammo in a semi-auto rifle, you might want to use a Redding taper crimp die. This helps retain the bullet in the case when the action slams shut. In a bolt gun, crimping is not necessary.

I like to use bullets that have a little boat tail (tapered base). This gets the bullet started without distorting the case mouth. Nosler Ballistic Tips, or Hornady V-Max work well.

jgalar · « **Reply #8 on:** December 10, 2003, 02:23:11 AM »

josebd:
Your neck expander ball is on the small side. Just try loading your bullets. If you have problems seating the bullet without damaging the case - contact your die maker and they will send you a new expander or die.

josebd · « **Reply #9 on:** December 10, 2003, 03:04:43 AM »

i've been using the lee collet neck resizer,i've been setting the bullet with about an average of .217,haven't had any problems buckling the case,but i did notice the other day i had two out of 30 that did chamber kinda tight.

jgalar · « **Reply #10 on:** December 10, 2003, 03:58:17 AM »

I know Lee is good about sending a different mandrel for that die if you wish. Without looking at what you have, your cases may be getting hard to chamber because you are only neck sizing. Thats one reason they say not to neck size for levers and autos. You may need to eventually get a regular lee die and adjust it to just barely work the shoulder. I personally have never had to.

Being a little tight to chamber means the case is a good fit to the chamber.