Long Range Hunting Online Magazine


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

Reloading Techniques For Reloading


Reply

Do I need to neck turn?

 
LinkBack Thread Tools Display Modes
  #8  
Old 03-19-2013, 07:03 AM
Platinum Member
 
Join Date: Dec 2005
Posts: 2,114
Re: Do I need to neck turn?

Lefty, thanks, I just realized that myself.

It doesn't matter if the case is several thousandths shorter than chamber length. A couple thousandths shorter necks has no noticable effect on anything.
Reply With Quote
  #9  
Old 03-19-2013, 08:35 AM
Platinum Member
 
Join Date: Oct 2007
Location: Mountians of SW NC, near Asheville
Posts: 1,596
Re: Do I need to neck turn?

I've made a couple dozen chamber casts to measure the necks. As a general rule I've found the chamber neck will be about a thou larger than the diameter of a fire case.
Reply With Quote
  #10  
Old 03-20-2013, 07:47 PM
Gold Member
 
Join Date: Jan 2008
Location: Gillette WY
Posts: 629
Re: Do I need to neck turn?

took the rifle out again today. Loaded up 180 grain bergers about 20 thou off the lands starting load was 51gr. of h4831sc. Loaded up 6 rounds starting at 51 and going up in 1 grain incriments. all the fired rounds and easy bolt lift, no signs of the pressure there, the primer looked good but there were some slight ejector marks on the cases. I didnt crono them but I wish i would have being that the 53gr load 54grain load 55gr load and 56gr load all ended up shooting into a group that measured 0.330" outside to outside. I will post up some pictures when i get a chance
__________________
Remington 700 7mm SAUM Magnum Research Barrel
Remington 700 7mm Rem Mag Ultralight
Remington 700 22-243 Supressed
Savage Target Action 6mm-284
Savage Target Action 6.5x47 Lapua
Savage Predator Hunter Max1 6.5-284 Norma
Savage Predator Hunter Max 1 22-284 Norma
Savage Bear Hunter 338 Win Mag
"Gotta Kill It Before You Can Grill It"
Reply With Quote
  #11  
Old 03-20-2013, 08:02 PM
Gold Member
 
Join Date: Jan 2008
Location: Gillette WY
Posts: 629
Re: Do I need to neck turn?


__________________
Remington 700 7mm SAUM Magnum Research Barrel
Remington 700 7mm Rem Mag Ultralight
Remington 700 22-243 Supressed
Savage Target Action 6mm-284
Savage Target Action 6.5x47 Lapua
Savage Predator Hunter Max1 6.5-284 Norma
Savage Predator Hunter Max 1 22-284 Norma
Savage Bear Hunter 338 Win Mag
"Gotta Kill It Before You Can Grill It"
Reply With Quote
  #12  
Old 03-21-2013, 06:24 AM
Platinum Member
 
Join Date: Dec 2005
Location: Tucson Az
Posts: 1,203
Re: Do I need to neck turn?

Great package! You have enough clearance based on the dimensions you posted.

My friend Dan, a 1000 BR shooter, runs a 7 SAUM for his light gun. He is also necking down the 300 SAUM. He uses .001" clearance per side BUT he turns the necks. He also turns them every time before reloading them. With such a small amount of release he has no room for error. His rifle won best agg, tightest group and high score first time out! He shoots the 180 hybrid target.

You are running .0025" per side IF every piece of brass has the same neck thickness. There is some springback after firing. I also have a snug neck with my 7mm/375 Ruger after firing and cannot push a bullet down the neck by hand and it is running .003" clearance per side . FYI all cases were turned to .0135" to fit a .317 neck.

Did you measure every loaded round? Perhaps a few got by you that were thicker. It won't hurt performance to skim turn all cases to ensure the neck wall thicknesses are the same. I would bet there are a few that are thicker. This would also help with consistent neck release.

Perhaps there is more bearing surface on the 162 hornady match bullet than the 168 VLD causing your load to appear to be too hot. There could be other factors in your particular rifle and the reason we have to start low and observe how the individual rifle responds.

Be sure to share anything you learn as you continue to work with your new rifle.
Reply With Quote
  #13  
Old 03-21-2013, 06:40 AM
Platinum Member
 
Join Date: Dec 2005
Posts: 2,114
Re: Do I need to neck turn?

I don't think it matters how much clearance there is between a rimless bottleneck case neck and the chamber neck as long as the case neck's well centered on the case shoulder. Those with .005" clearance all the way around will center in the chamber neck just as perfect and repeatable as those with .001". Chamber and case body and neck diameters do not determine how well centered such cartridges align themselves in the chamber.

More important is how well centered the case neck is on the case shoulder. That's what determines how well centered the case neck is in the chamber neck. And a half thousandths spread in neck wall thickness doesn't seem to matter. Having shot sub 1/2 MOA 15-shot test groups with virgin brass with near .001" spread in wall thickness at 800 yards and further, I'm convinced there's other stuff more important to good accuracy.

If one has the tools to do so, measure the force needed to pull bullets across a batch of seated bullets in cases with different amounts of neck wall thickness. Most folks who have done this are quite surprised.
Reply With Quote
  #14  
Old 06-16-2013, 06:36 PM
Silver Member
 
Join Date: Aug 2012
Location: Champaign, IL
Posts: 180
Re: Do I need to neck turn?

This question may be a little bit off the subject, but what would be the minimum neck wall thickness acceptable & still be safe?
Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes


Current Poll
Do You Shoot Rifle Competition?
YES - 33.67%
764 Votes
NO - 66.33%
1,505 Vote
Total Votes: 2,269
You may not vote on this poll.

All times are GMT -5. The time now is 06:13 PM.


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