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Question for 300RUM Owners

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Unread 03-23-2010, 08:36 PM
Silver Member
Join Date: Mar 2009
Location: Pilot Rock Oregon
Posts: 123
Re: Question for 300RUM Owners

190 berger vld 95 grains retumbo fed 215m primer seated 3.680" nosler brass neck sized. Check for copper fowling. Use a good nylon brush and some sweets 7.62 or good copper remover... Alway run a oil patch after.... check all your mounts... Start sighting it in at 25 yards and get it on papper. I almost bet your flinching a little bit.... Try using a led sled.... Don,t shoot it till it gets hot... This has worked for me.... God luck...
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Unread 03-23-2010, 10:18 PM
Gold Member
Join Date: Feb 2008
Location: Sonoma County, CA
Posts: 827
Re: Question for 300RUM Owners

Freebird, I'm sort of in the same boat as you. I've got just over 100 rounds through mine and getting halfway decent acuracy with H-1000. I've been shooting 4 shot groups and getting something like .75. Not as consistent as I would like though with ES. I've been trying .020 off the lands and single feeding them and that has made a big difference. Shot a .1 with it, could barely tell it was more than one bullet. One thing though, the pressure went through the roof, so start way low if you do this.

If that seating depth works, consider a Wyatts extended box mag for it. I think you can load to 3.820 OAL with it. I talked with Kevin Cram about it and he said it would be $85 installed, that includes the box.
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Unread 03-24-2010, 02:22 PM
KDB KDB is offline
Bronze Member
Join Date: Jun 2009
Location: Arkansas Delta
Posts: 94
Re: Question for 300RUM Owners

I would check out the sticky thread in the reloading section about getting the best performance and accuracy with Vlds. It will help you get the sweet spot you are looking for with these bullets. Essentially you start with the bullet .010 jammed into the lands, then back it off .040, and then another .040 (.080 off lands) and then another .040 (.120 total). Somewhere in there you should see it settle down and produce the groups you are looking for. At that point you do the finite adjustments in +/- .010 until you get it right.

The thread suggests 6 rounds per depth change, but I would imagine that 3-4 would be sufficient.

I have had good luck with Retumbo and 190 vlds and 208 amaxs. Going to try VV N-570 next.
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