Author Topic: buckling shoulder (Read 583 times)

Myerslake2005 · « **on:** June 18, 2006, 08:42:42 AM »

I'm attempting to load my 7mm-08 with Nosler 140Gr Balistic Tips. Everytime I seat the bullet I'm buckling the shoulder. I sems to buckle at the last portion of the stroke of the press arm. Any suggestions to stop this? I have attempted to back my die off the shell holder 1/4 turn and reset my setting depth screw but it hasn't helped.

Thanks

CyberSniper · « **Reply #1 on:** June 18, 2006, 03:45:40 PM »

Leave a gap about the thickness of a nickel between the shell
holder and the bottom of the die when the ram of the press
is all the way up. Also, it might help a little to bevel the inside of the
case mouth, in case you are not doing that already.

jhalcott · « **Reply #2 on:** June 18, 2006, 04:51:52 PM »

sounds like you might be trying to crimp the bullet while still seating it! Run your seater stem in a couple turns and adjust the die so the bullet is FULLY seated. Then back out on the stem and adjust the die to JUST crimp the case to the bullet. It is some times(usually) better to seat all the bullets and reset your die for crimping in a separate step. hope this helps!

Graybeard · « **Reply #3 on:** June 18, 2006, 05:06:49 PM »

Have you trimmed the cases? Either your case is too long or you have your seater die set incorrectly. When you buckle the shoulder like that it is because the die is making contact with the case before it is at the end of the stroke. If you set the die to just touch the case mouth on a case that is the maximum length and then never try to load one unless it's less than max you'lll not buckle shoulders.

Lawful Larry · « **Reply #4 on:** June 24, 2006, 04:46:21 AM »

What everyone stated is fact. What I do is place the case in the shell holder and back off the die. I then run the case into the die all the way. I then screw the die back down until it makes contact with the case. At this point I then back off the die by at least a half turn. I then secure the die. I then adjust the seating ram to the desired bullet length you require. After setting the ram you should be in business and commence loading.

Hope that explains it as simple as I can say.

JBMauser · « **Reply #5 on:** June 24, 2006, 05:02:33 AM »

What lawfularry said is correct I just want to say it a differnt way. You regulate your resizing die to cam over on the shell holder to full length resize. If you wnat to resize just the neck you leave a space about the thickness of a nickle and you will not bump the shoulder. You regulate you bullet seating die not on the shell holder but on the case mouth. You do not consider the shell holder from the die at all! This is why you can use a .308 bullet seating die for other longer .30 cal cartridges. You run the empty case in up to the top of the ram as stated and you screw the down to touch it and stop. Small adjustments at that point will affect your crimp but any deeper and you will deform the brass. Best of luck JB

daddywpb · « **Reply #6 on:** June 25, 2006, 06:29:49 AM »

If you're not trimming your cases, that could be the problem. Use some kind of case trimmer (Lee works great) so the brass is all the same length. If you adjust your crimp die on a case that is a bit shorter than the next, when the longer case hits the crimper, you'll have a buckled shoulder. Consistency is the key.

eroyd · « **Reply #7 on:** June 28, 2006, 12:21:02 PM »

If it's more of a dent in one place around the shoulder, the tiny breather hole may be blocked.

PA-Joe · « **Reply #8 on:** June 29, 2006, 01:45:58 AM »

1. Have you checked your cases before seating the bullet. The dent may be from too much lube during the sizing step. 2. Are you using the correct size bullets 7mm not 308?

As most of the above, I seat the bullet and then crimp in a separate step.

Don Fischer · « **Reply #9 on:** June 29, 2006, 04:32:09 AM »

I never have that problem but then I never crimp. I've seen it befor and it is the crimping part. If the bullet is caught on the edge of the mouth, what happens is that the neck buckles on one side and the case won't even go in the die all the way. Well maybe with enough leverage.

As to not crimpimg, I've never had trouble with bullets seating deeper on recoil, as least not noticeably. And if they have, hunting accuracy has never been adversely affected. Think I would crimp in a tube fed lever gun.