Author Topic: Bullet Seating Issue (Read 388 times)

qballs · « **on:** September 17, 2004, 02:51:26 PM »

I am loading up some .243 shells and noticed that the copper is being scraped off of the bullet when I go and seat them. Is this normal? Should I be worried? I measured the inside of the case mouth and it measured .234 which seemed small. Will this increase pressure? The cases have been sized. I am using nickel cases. Would that make a difference?

longwinters · « **Reply #1 on:** September 17, 2004, 03:44:08 PM »

I load for 243 and the only time I have seen this is when using new brass. Often the inside of the mouth is rough and even resizing does not smooth it out. I clean out the inside then with a champfer tool. I really did not notice any difference when I did shoot some without smoothing out the mouth.

Long

KN · « **Reply #2 on:** September 17, 2004, 04:39:43 PM »

Chamfer your case necks, they probably have a burr or a sharp corner. It will make seating a lot easier and more consistent. The case neck opening should be undersized before you seat the bullet of you won't get a good "grip" on the bullet. KN

Iowegan · « **Reply #3 on:** September 17, 2004, 04:46:44 PM »

There's a couple of things you can do to prevent peeling. You can bell the case mouth so the bullet gets started past the rim. You can also use a boat tail bullet. The tapered base will load without peeling. You might consider getting a new expander ball for your sizer die that is a bit larger. Personally, I usually go for a tight fit and like expander balls to be .008~.010 smaller than bullet diameter, just like yours.

Yes, peeling can affect accuracy. The bullet seating process may deform the case too. Any time you have a variation in the process, you risk loosing accuracy.