300 ultra mag reloading info

Shane Lindsey

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Jul 13, 2010
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1,544
Based on the various books/data I have found RUM data seems to be like playing craps. Just roll the dice.

Pressure signs below book starts, but chrono above max velocities. Blow on the cartridge before you load it in the chamber for luck!!!
 

rsbhunter

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Apr 3, 2006
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318
Location
New Mexico
91.br Retumbo 210 Berger VLD hunting ......will do these groups fairly consistently, custom Rem 700.rsbhunter
 

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rsbhunter

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Apr 3, 2006
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Location
New Mexico
Yes sir, I don't shoot it much, built as an elk rifle, has a heavy Krieger bbl, built by Kampfeld. Luckily , there were two members of the gun club there (who I didn't know at the time) who witnessed it. Velocity is 3150 fps. I have shot (off bench) groups under an inch since that group.....I honestly believe this is my once in a lifetime rifle.....my grandson will be happy one day....rsbhunter
 

asd9055

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Nov 15, 2013
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665
Location
Texas
Yes sir, I don't shoot it much, built as an elk rifle, has a heavy Krieger bbl, built by Kampfeld. Luckily , there were two members of the gun club there (who I didn't know at the time) who witnessed it. Velocity is 3150 fps. I have shot (off bench) groups under an inch since that group.....I honestly believe this is my once in a lifetime rifle.....my grandson will be happy one day....rsbhunter
Great rifle and great shooting. Thanks for sharing!
 

WYO300RUM

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Mar 23, 2011
Messages
1,831
Location
Wyoming
Looking for a starting load with Vihtavuori N565 with a 230gr Berger. Not much data that I've found.

Thanks
92.5 grs. N570 with 215 Berger Hybrid works very good. Have but haven't tried N565. Used Retumbo for many years with great results. Haven't tried since had new barrel installed .
 

Rum Man

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Nov 2, 2017
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Montana
Ok here is one I played with to hit a Milk jug at a Mile ! I didnt push this one past 1760 yards yet !
LRH parts built rifle . As follows ;
Remington action bolt face trued , lugs lapped . Take off Remington long range barrel , chamber cleaned up, 25" plus a 3 port brake . Timney , Christensen arms long range custom Big foot stock !

230 berger Otm's and Nv570 @ 3036
Sd -1 es- 4
This was at 3434' elevation .
If the weather holds out I'm shooting some on Sunday ..
Good Luck !

Rum Man
 

WYO300RUM

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Mar 23, 2011
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1,831
Location
Wyoming
Barrel length?
Free bore?
Velocity?
28 in. Bartlien barrel. No free bore. 3136 ave. FPS. No pressure. Very low es and sd. I can find it if you want. If you want more specifics on rifle or load let me know. ADG brass. Fed 215 mag match primer
Rem 700 action tried. Trigger tech trigger.
 
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