Long Range Hunting Online Magazine

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

Reloading Berger Bullets


300RUM problems

LinkBack Thread Tools Display Modes
Unread 04-30-2009, 02:36 PM
Silver Member
Join Date: Jul 2001
Location: San Antonio, Texas
Posts: 244
Re: 300RUM problems

Seating die is not adjusted properly. Assuming that your using a standard bullet seating/crimp die. If you have the die to far down, upon seating the bullet the die trys to crimp the case mouth. Sierra matchkings don't have a cannalure for crimping and the result is the brass gets pushed back, bulging the shoulder.

Easy fix! Back off 1/8 of a turn on the die.

Been there and done that! I accidentally got a few 270win cases mixed in with a whole bunch of 30-06 brass. With the elliptical expander on the die I never noticed the fact that I was necking up to 30cal. Never did trim the brass so when I went to seat bullets the "longer 270win" cases bulged big time at the shoulder.
Reply With Quote

Unread 04-30-2009, 03:13 PM
Junior Member
Join Date: Mar 2009
Posts: 25
Re: 300RUM problems

I just did something very similar on another caliber. Just like has been mentioned, turned out I had the seating die screwed in too far.

I reset the die by first backing the die out so far there was no chance the cartridge mouth would touch the crimp shoulder inside the die.

I put a prepared case in the press and ran the ram all the way up.

Slowly screw the die into the press, you will definitely feel when the crimping shoulder in the die contacts the cartridge mouth.

Back the die off 1/8 to 1/4 turn and set the lock ring.

Adjust your bullet seating depth as required.
Rum River

"Hell boys, I'd rather be hung by my friends instead of a bunch a damn strangers."
Reply With Quote
Unread 05-01-2009, 01:09 AM
Bronze Member
Join Date: Dec 2004
Location: South Africa
Posts: 40
Re: 300RUM problems

I think everyone's got it right. will experiment tonight. Amazing what a fresh perspective can do

Many thanks for the help.
Reply With Quote
Unread 05-01-2009, 01:51 AM
Bronze Member
Join Date: Nov 2008
Location: Northamptonshire, UK
Posts: 46
Re: 300RUM problems

Just a final thought - don't use too much resizing lubricant - just a light covering is all that is needed.

Interested to know how you get on!

'Those who beat their swords into plow shares may one day find themselves under the yoke of those who chose to keep their swords...'
Reply With Quote


Thread Tools
Display Modes

Similar Threads for: 300RUM problems
Thread Thread Starter Forum Replies Last Post
700 problems michaln Gunsmithing 16 11-16-2009 09:09 AM
270/300RUM problems any ideas? eddybo Rifles, Bullets, Barrels & Ballistics 0 11-17-2008 11:10 AM
300rum RELOADING Brass PROBLEMS!!!! 300rum Reloading 6 08-14-2006 09:49 AM
Help! 300RUM load problems RDM416 Reloading 6 07-14-2005 12:32 PM
6.5 x 284 SD problems Varmint Hunter Rifles, Bullets, Barrels & Ballistics 10 05-03-2005 08:31 AM

All times are GMT -5. The time now is 08:56 PM.

Powered by vBulletin ©2000 - 2016, Jelsoft Enterprises Ltd.
Content Management Powered by vBadvanced CMPS
All content ©2010-2015 Long Range Hunting, LLC