Long Range Hunting Online Magazine


Go Back   Long Range Hunting Online Magazine > Rifles, Reloading, Optics, Equipment > Reloading

Reloading Techniques For Reloading


Reply

7RUM reloading problems

 
LinkBack Thread Tools Display Modes
  #1  
Old 01-17-2010, 10:57 PM
Junior Member
 
Join Date: May 2008
Location: Henderson, NV
Posts: 15
7RUM reloading problems

First, let me say that I'm a novice at reloading. I've got a custom 7RUM that's only had about 50 rounds through it while breaking the barrel in. When I picked it up from my smith, he told me that he was having issues with some of the factory remington rounds chambering but thought that it was due to the varying neck size on the factory loads. He stated that the rifle has a match grade chamber and that some of the necks on the factory brass were out of tolerance. While breaking in the barrel with factory remington ammo I found that about half of it would chamber fine, and the other half would not. It wasn't a big deal to me as I gave the ammo that wouldn't chamber to my uncle who has a factory 7RUM and it chambered just fine for him.

Now, I bought some bulk 7RUM unfired brass and am running into problems. I FL sized the brass with a forester die, checked overall length and neck dimensions and everything looked fine. However, once I seat the bullets they will not chamber in the rifle. The bolts ends up roughly 1/4 shy of being all the way.

I've got some reloads from the breakin brass that chamber fine, and when I check the dimensions between the two (the once fired vs. the virgin brass) I cannot tell the difference. I was hoping someone on here could possibly tell me what I'm missing. I've got a neck turner so it wouldn't be a big deal to turn some of the brass, but as I stated above when I compare a round that chambers to a round that will not, I don't notice any discrepancies. Thanks.
Reply With Quote
  #2  
Old 01-17-2010, 11:15 PM
GNERGY
 
Posts: n/a
Re: 7RUM reloading problems

Did you make sure the resizing die touched the shell holder when you adjusted it first. Sounds like the shoulder needs to be set back a little. Make sure when you are resizing the case it goes all the way in the sizing die ( no space between die bottom and top of shell holder ). Did you try chambering one of the resized empty cases first.
Tarey
Reply With Quote
  #3  
Old 01-18-2010, 09:58 AM
Junior Member
 
Join Date: May 2008
Location: Henderson, NV
Posts: 15
Re: 7RUM reloading problems

I double checked that the resizing die was touching the shell holder. I loaded up a dummy round without primer and powder and it is the one that will not chamber. I did not try one just after resizing without a bullet seated. I can do that tonight.

The thing that bothers me is that, as stated before, when I measure the difference between a round that will chamber and one that will not, I do not notice a difference that should effect chambering the round. If anything, I've found that the round that doesn't chamber is actually a little smaller in most dimensions which should make it chamber a little easier. The one thing that I didn't check was the taper of the round itself, from the shoulder down to the rim. I know that the o.d. at the shoulder is within spec but I did not really check lower that that. Is there any way that if the taper is out of spec it could be causing the problem?

One other note, when I started running into problems I took a marker and painted the bullet, neck, and shoulder to see if I could potentially see what was causing the problem. I then tried to chamber the round and put a little force on it hoping that it would mark up the paint that I had put on the round. When I removed the round I cannot see anywhere on it where it may have rubbed or anything causing it not to chamber. This just confused me greater. I'm thinking about borrowing my uncles RCBS FL sizer die to see if it makes any difference.

Thanks for any input on this matter.
Reply With Quote
  #4  
Old 01-18-2010, 11:59 AM
Platinum Member
 
Join Date: Jul 2004
Location: SW MO
Posts: 1,154
Re: 7RUM reloading problems

I would go back to your gunsmith and see if he can figure it out. Sounds to me like it has a tight neck chamber (smaller diameter than saami specifications). If it is a standard neck chamber, there is almost no way that factory ammo wouldn't chamber as it is generally smaller dimensionally than conventionally full length sized reloads. You may have to turn the case necks to a smaller diameter or have him open up the neck to standard diameter. Either way, he needs to be of assistance. I wouldn't think a good gunsmith would send out a rifle that wouldn't chamber factory ammo unless a person specified tight neck chamber. Best of luck.
__________________
Lefties are the only ones in their right minds!
(and I ain't talkin' politics!)

NRA Life Member
Reply With Quote
  #5  
Old 01-18-2010, 12:42 PM
Junior Member
 
Join Date: May 2008
Location: Henderson, NV
Posts: 15
Re: 7RUM reloading problems

I initially thought it was the necks as well, but when I check the neck dimensions on a round that would chamber vs. a round that wouldn't chamber I found that the ones the wouldn't were actually a few thous. smaller that the round that chambered. This just confused me even more. Thanks for the help so far.
Reply With Quote
  #6  
Old 01-18-2010, 02:09 PM
GNERGY
 
Posts: n/a
Re: 7RUM reloading problems

Downsouth, when you run the shell in the resizing die and the press is all the way up is there a space between the bottom of the die and the top of the shell holder? You might have to adjust for press flexing. Does that make sense?
Tarey
Reply With Quote
  #7  
Old 01-18-2010, 02:49 PM
Junior Member
 
Join Date: May 2008
Location: Henderson, NV
Posts: 15
Re: 7RUM reloading problems

That makes sense. I'll have to check tonight when I get back home. Thanks for the help.
Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes


Similar Threads for: 7RUM reloading problems
Thread Thread Starter Forum Replies Last Post
22-250 reloading problems shutzen Reloading 5 09-15-2010 08:48 AM
7RUM 1/12 help Limbic Reloading 3 08-09-2010 08:58 AM
Reloading Problems yote doctor Reloading 7 05-05-2010 09:30 AM
problems reloading 300 win mag darrindlh Reloading 9 02-28-2010 02:59 AM
300rum RELOADING Brass PROBLEMS!!!! 300rum Reloading 6 08-14-2006 09:49 AM

Current Poll
Do you archery hunt for elk?
YES - 32.12%
62 Votes
NO - 52.33%
101 Votes
Not yet, but I plan to. - 15.54%
30 Votes
Total Votes: 193
You may not vote on this poll.

All times are GMT -5. The time now is 03:02 AM.


Powered by vBulletin ©2000 - 2014, Jelsoft Enterprises Ltd.
Content Management Powered by vBadvanced CMPS
All content ©2010-2014 Long Range Hunting, LLC