Long Range Hunting Online Magazine


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

Reloading Techniques For Reloading


Reply

7mmRUM Load Info

 
LinkBack Thread Tools Display Modes
  #8  
Old 12-18-2007, 03:51 PM
Platinum Member
 
Join Date: Dec 2002
Location: Northern Michigan
Posts: 1,014
SB, There is no explanation for it but the 180's held up much better (by comparison) than the 175 SMK's did out of a 1in7 twist I had. 7 of 10 SMK's never made it to the 100 yd target. 8 of 10 Berger 180's did. Maybe it was just coincidence.
Reply With Quote
  #9  
Old 12-18-2007, 05:09 PM
Silver Member
 
Join Date: Nov 2007
Location: I live in the outdoors, but ihave to stay in the Houston area so I can afford to live outdoors!
Posts: 165
Quote:
Originally Posted by MagMan View Post
SB, There is no explanation for it but the 180's held up much better (by comparison) than the 175 SMK's did out of a 1in7 twist I had. 7 of 10 SMK's never made it to the 100 yd target. 8 of 10 Berger 180's did. Maybe it was just coincidence.
Are you talking about the bullet flying apart after it leaves the muzzle?

I have heard of this in 22-250...a guy I know used to do it as joke when at the range when he would let someone shoot his Ruger #1. He swap the ammo he was using with some super hot stuff...bullet never made it to the 100 yard targets.
__________________
There is not such thing as too many guns, safes or fishing poles!
Reply With Quote
  #10  
Old 12-18-2007, 05:27 PM
Platinum Member
 
Join Date: Dec 2002
Location: Northern Michigan
Posts: 1,014
Yes, The reason they came apart was because of the 7 twist. The unexplainable part is the SMK's have a thicker jacket.
Reply With Quote
  #11  
Old 12-18-2007, 05:31 PM
Silver Member
 
Join Date: Nov 2007
Location: I live in the outdoors, but ihave to stay in the Houston area so I can afford to live outdoors!
Posts: 165
Do you think it would still be an issue with a 9.5 twist?
__________________
There is not such thing as too many guns, safes or fishing poles!
Reply With Quote
  #12  
Old 12-18-2007, 06:49 PM
Gold Member
 
Join Date: Jan 2007
Location: North Idaho
Posts: 670
No issue with 9.5 twist.
Reply With Quote
  #13  
Old 12-19-2007, 03:23 AM
Silver Member
 
Join Date: Mar 2002
Location: Southern Illinois
Posts: 397
Interesting MagMan. That's one fast twist barrel for sure. Maybe those Wildcat 200RBTs would hold up......? Linksmechanic is right - no probs with a 9.5" twist. Mine's a 9". I've seen jacket separation with a couple different 22-250 Ackleys >>>>>>>>>>>>>>> POOOOOOOOOOFFFF !!!

I had actually looked at the 180 Bergers as soon as the 300 RUM came out. I thought, WOW, something able to push a .750BC bullet at well over 3,000 fps. I did some talking to some helpful folks, like Walt Berger, Jimmie Knox, and Bob Cauterucio, and learned more about jackets and RPMs. Walt laid the phone down for several minutes, walked upstairs, and retrieved some data on 6.5 RPMs. He concluded that the 180s were very iffy at the RPMs I expected from what was then a wildcat (the 7mmRUM hadn't been introduced) since the quality, but thin, Berger jackets might separate from the cores. Obermeyer reportedly found out the hard way in experimentation. Being the gentlman he is, Walt suggested I talk to Jimmie & Bob ... also both fine people! The 156 and 176 Cauterucios have been my go-to bullets ever since.
Reply With Quote
  #14  
Old 12-19-2007, 07:29 AM
Platinum Member
 
Join Date: Dec 2002
Location: Northern Michigan
Posts: 1,014
Quote:
Maybe those Wildcat 200RBTs would hold up......?
They did for the first 100 rounds after that I'd be hard pressed to get two in a row out safely. It wasn't so much a poof it was more like a shotgun blast, no crack and definitely no impact.

The 160 Accubond was the go to bullet.
Reply With Quote
Reply

Bookmarks

Thread Tools
Display Modes


Similar Threads for: 7mmRUM Load Info
Thread Thread Starter Forum Replies Last Post
7mm rm load info Levi Reloading 5 02-06-2013 11:20 PM
.300 WSM Load info HDTony Reloading 9 08-26-2010 07:47 PM
.223 Load Info scsims Reloading 5 02-23-2008 12:16 AM
Need load info on 30-378 WM. RT2506 Rifles, Bullets, Barrels and Ballistics 4 02-14-2008 10:25 PM
Anyone want some 7/WSM load info?.... MikeW Rifles, Bullets, Barrels and Ballistics 0 07-01-2002 11:47 PM


All times are GMT -5. The time now is 01:07 AM.


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