Author Topic: 7-30Waters Loading Problem (Read 406 times)

rimfire · « **on:** August 02, 2004, 05:19:44 PM »

Some help here!

VVCG Contender barrels [2 of them] in 7-30Waters. Loading between 35 and 36 gr 748 behind 120NBT or 130SSPB. Using both formed 30-30 brass and federal factory brass after shooting the factory load.

1st time we reloaded with this same die set and same barrels...no problem. Cases loaded fine...accuracy outstanding...no problems.

Ever since...problem. Loads will not chamber without turning brass off of the neck from the shoulder out half way up the neck.

Cases chamber fine after resizing. Don't chamber with a bullet seated.

Bullets are not hitting the rifling. I actually chucked a few in a drill press and sanded off a few thou from the outside of the neck and they would then load and fire. Brass so thin I had to throw it away after firing.

Number of reloads per case makes no difference. I can shoot a factory load, reload it immediately with it full length resized and is will not load.

Overall case length not an issue because 30-30 cases are much shorter than 7-30 and they have the same loading problems when we try them.

What is up here guys? These are the same cases, bullets, dies and guns as before?

I know the Virgin Valley chambers are probably on the tight side of SAAMI specs. Could it be that we are not bumping the shoulder back like we should? Same shell holder, same press, same set of dies???

Would appreciate any ideas as this is frustrating.

Graybeard · « **Reply #1 on:** August 03, 2004, 01:09:32 AM »

The only times I've had this problem I found the bullet seater die was making contact with the case too soon and putting just a bit of a ruffle in the case neck or shoulder area. Cure is to either raise the die just a wee bit or shorten the neck. I recommend you ALWAYS set up the seater die with a max length case and then as long as you always check case length and trim as needed you shouldn't have the problem. If you set up the die with a case trimmed to minimum then any time you have a case longer you'll get the condition you mention.

Since trimming the neck back fixes it I'm pretty sure this is your problem.

Just find a case that is at the max length before trimming and set up the seater die to just barely touch it. You don't need to crimp for this round so no need to do more than just barely touch the case with seater die.

GB

rimfire · « **Reply #2 on:** August 03, 2004, 01:19:26 AM »

It is not case length. The reformed 30-30 cases do the same thing and they are almost 1/4" shorter than the 7-30 cases.

I wasn't trimming the case length to get them to chamber. I was removing brass from the OD of the neck down near the shoulder.

Sorry...but NEXT!

Added note with edit: By the way GB...I hope I wasn't seen as a sarcastic jerk the way I responded with the Sorry...but NEXT!. I was trying to be humerous, but may have come off as insulting. Was not meant that way.

5Redman8 · « **Reply #3 on:** August 03, 2004, 01:30:48 PM »

Sounds like a tight neck.....when you bought the barrel, did you specify you wanted a tight neck chamber??? Did you buy it second-hand? I would get a Forster Outside Neck Diameter trimmer or NECK TURNER. I have one that I have never used with the 7mm mandrel if you are interested. I bought it for my VVGC 280 AI barrel but my neck is not tight.

see link http://www.midwayusa.com/rewriteaproduct/219509

Kyle
topboss8@yahoo.com

rimfire · « **Reply #4 on:** August 03, 2004, 02:07:52 PM »

We are not crimping and did not specify a tight neck. Case fits in the chamber without a bullet but with the neck intact, after resizing, fine. Add the bullet and it will not fit.

Bought both barrels new from Virgin Valley about 6 months apart. Both with no special chamber requested; i.e. it was supposed to be VVCG's standard chamber.

I was hoping that another idea might work that I found on another post unrelated to this problem.

I was wondering if the shell holder was too thick such that it would not allow the sizer die to get all the way down on the case, maybe it was not completely sized. It will chamber then without a bullet, but when the bullet is seated added to the shoulder maybe being a little too far forward this just oversized the neck. If I bumped the shoulder back just slightly it, since the neck tapers towards down towards the tip of the case, this would move the largest diameter farther back in the like tapered chamber neck and maybe allow it to chamber.

Still struggle with the fact that the first time we reloaded once fired factory brass [bought box of factory loads, fired, then loaded] they chambered fine. We now load once fired factory brass [same deal] and they don't chamber. Still driving me nuts and we think we are setting it up the same way on the press.

jgalar · « **Reply #5 on:** August 03, 2004, 02:52:44 PM »

measure the diameter of the neck without a bullet. measure the neck diameter with a bullet installed. measure the diameter of the chamber.

5Redman8 · « **Reply #6 on:** August 03, 2004, 03:00:38 PM »

Sounds like there is too much metal after the bullet is seated. Meaning the brass will have to be turned. All VVGC chambers are on the tight side of specs.

Kyle

Graybeard · « **Reply #7 on:** August 03, 2004, 04:24:31 PM »

Reckon I misunderstood what you were saying that first time. Based on clarification it sure sounds like you have too tight a neck. If you ordered the barrel new VVCG should fix it so you don't have to turn case necks as long as you didn't ask for a tight neck chamber. I sure wouldn't want one I had to turn necks on.

GB