What is your favorite .300RUM load?

Camshaft

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No, I have never gotten into it, though to be honest the brass could probably benefit from it. I have yet to push my rum past 700 but have no problems keeping sub half moa out to this distance. But I do plan to start turning and anealing case necks.
 

prariehunter

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Mar 27, 2007
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I was wondering does a factory sendero have the right twist for the 240gr matchkings or are you guy's shooting these bullets in custom barrells?
 

Gary Morgan

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I just got through working up a load for my Krieger-barreled 300 RUM. I didn't want to shoot it a lot working up a load, so I only tried two bullets, the 208 Hornady and the 210 Berger. Bergers shot best and did so with 94 grains of Retumbo with the bullet seated just touching the rifling. I used Remington brass from Cabela's, which had less than .001 difference in neck thickness. The barrel is a 28-incher, chrono said 3,175 FPS, best three-shot groups at 100 yards were .175 and at 500 yards 1.963 inches.
 

SomeRumbum

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96.0 of RE-25, FED215m, 180 Accubonds
Also
96.0 of H-1000, FED215m, 168 Nosler Combined Tech.

both do over 3200 fps and shoot nice clover leafs.

Many use heavier bullets. I have not gotten the 210 Bergers to shoot as well from a Sendero as these loads. However, Project Next will include a Krieger barrel with a little faster twist. I have very high expectations for that project.

Good luck
 

Camshaft

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Sounds like a good project. I am probably going to rebarrel mine with a 30"Hart in a fluted sendero contour, with probably a 9 twist in a manners stock.
should be fun.
 

JDS

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I built mine with a Lilja barrel on a Bat action and put it in a HS stock.
DSC00213.jpg
 

roninflag

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JDS- what twist in that lilja? how does it shoot?? somerum- i would think a 10 twist would be plenty. roninflag
 

JDS

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JDS- what twist in that lilja? how does it shoot?? somerum- i would think a 10 twist would be plenty. roninflag

It is a 10 twist, 26" 6 groove. I just got done fire forming the brass and I'm getting ready to work up a load for it. I will be working with bullets form 180 to 210.
 

Camshaft

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Fireforming brass? Is it chambered for an improved version? I just saw the post on the new Bullets. The 225gr 30cal definitely looks like a good prospect for the rum.
 

JDS

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Fireforming brass? Is it chambered for an improved version? I just saw the post on the new Bullets. The 225gr 30cal definitely looks like a good prospect for the rum.

Its not really improved but a little tighter than a factory chamber. I always fire form brass and turn necks. Especially since I'm using Remington brass, I started out with 100 pieces and will cull the ones that are out of speck. I don't know if it is necessary but I enjoy doing it.
 
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