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300RUM fustration help

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Unread 05-11-2007, 03:15 AM
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Join Date: Dec 2004
Location: South Africa
Posts: 40
300RUM fustration help

seem to be getting nowhere with my stock standard Sendero in 300rum. We have a limited amount of local powders to choose from which makes the frustration even more. First loads with the rifle produced 0.5MOA straight out of the box with 200gr SMK's and a local powder that has a burning rate equivalent to H870, (CCI mag primers). Varying burn rates with the local powder (specifically the H870 equivalent) from tin to tin has made an almost impossible task of trying to duplicate that load. We have more consistent powders that are equivalent to H4831 and IMR 4350 but I'm not convinced that they're slow enough for such a big magnum.

Any help would be appreciated with the following. preferred bullet is 220gr, or 200gr smk.
- which primer CCI bench or CCI magnum ?
- should I perservere with local powder equivalent to H870 or has anybody had fair results with H4831 (next slowest burning powder equivalent that we have locally)
- Should I try using a lighter bullet (180gr) ?

Your help is appreciated

(South Africa)
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Unread 05-11-2007, 05:51 AM
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Join Date: Oct 2003
Location: Fredericksburg ,Va
Posts: 245
Re: 300RUM fustration help

Paul, Try some 180's with the slowest powder you can find.I use Retumbo in mine.98gr. of Retumbo behind 180gr. a Scirrocco with fed Mag Match Primers.
“From each, according to his ability; to each, according to his need” Karl Marx/BHO
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Unread 05-11-2007, 01:15 PM
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Join Date: Apr 2007
Location: Nut Bush
Posts: 52
Re: 300RUM fustration help

H-4831 should do pretty well with 180`s and I would think might even shoot the 200 but velocity would suffer.H-4831 is very close to RL-22 and it shoots great with the 165-180 gr bullets.
the jokes on you,your the friend of a fool
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Unread 05-21-2007, 06:07 PM
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Join Date: May 2006
Location: Sacramento, Ca
Posts: 106
Re: 300RUM fustration help

Definately the mag primers, I'm a huge TSX fan I don't see what you're gonna hit the 180g can't do just as good or better a job on than the 220-240's [img]/ubbthreads/images/graemlins/smile.gif[/img]
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Unread 05-21-2007, 06:10 PM
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Join Date: Oct 2006
Location: South Jordan, Utah
Posts: 73
Re: 300RUM fustration help

Paul, Try some 180's with the slowest powder you can find.I use Retumbo in mine.98gr. of Retumbo behind 180gr. a Scirrocco with fed Mag Match Primers.

[/ QUOTE ]

Good info, I shoot a 100gr of retumbo with a 180 gr. bullet and it's very accurate.
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Unread 05-22-2007, 02:17 AM
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Join Date: Feb 2005
Location: Nevada
Posts: 2,783
Re: 300RUM fustration help

I have two 300 RUM, they both do real good with Retumbo
powder and your choice of 180,190,200,210 grains bullets.
Both my rifles like the 200 Accubond with the bullets sitted
just to fit in the magazine. And they both shoot the 210 Berger to about .020" into the lands. in 2006 we harvested an antelope at about 200 yards with the 210 Berger, a mule deer at about 380 yards with 210 Berger, and an Elk at 470 Yrds with 200 Gr. Accubond.


Give them a try!

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Unread 05-23-2007, 12:50 PM
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Join Date: Nov 2003
Location: Washington State
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Re: 300RUM fustration help

26", 10 twist, Rem 700, FED 215M

94.4g RL25 w/ 200 Swift A-frame--3095fps
96.3g Retumbo w/ 180 Accubond--3300fps
109g H869 w/ 200 Accubond--3200fps--this is the load I'm using now at .010 off the lands. My OAL is quite long as I stuck in a Wyatts 4" magazine.
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