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Retumbo loads for 300 Win Mag.

 
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  #8  
Old 11-06-2013, 08:49 AM
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Join Date: Nov 2013
Location: Utah, USA
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Re: Retumbo loads for 300 Win Mag.

Cheyenne19
Do you happen to know the fps on your load of 82 gr.?

Does anyone else out there have any reloading data for 200 - 210 gr bullets for the .300 Win. Mag.?

Retumbo seems to me to be a VERY compressed load.

e-mail me if you would like. kevinkrood@gmail.com

Thanks,

k
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  #9  
Old 11-06-2013, 12:12 PM
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Location: Washington State
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Re: Retumbo loads for 300 Win Mag.

Try a Sierra 200gr SpBT Gameking in front of 75gr of IMR 7828 in a WW case and a Federal #215 mag primer. This is an absolute max load (62kpsi on my Pressure Trace II) and top load in the Sierra Manual so start at least 1gr down. Clocks a solid 2900fps over the Chrony with a SD around 13fps. I am going to try Superformance next.
This in my son Anton's 26" Rem SD Stainless/synthetic.
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  #10  
Old 11-06-2013, 09:07 PM
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Re: Retumbo loads for 300 Win Mag.

Quote:
Originally Posted by Merlin View Post
I'm thinking about trying 185 vlds in my 300 win mag, I thought about using Retumbo, but can't seem to find any load data. If anyone is using this or nows where to find some load data, would like to know what your using or where I can fan find some.
If you have IMR-7828 or RL-22 you should go with either of these 2 powders. I worked up a load with the same bullet in my 300 using 7828 as I was out of Rl-22 at the time. Both work really well with bullets in the 180-190 grain weight range. I have also seen retumbo get weird in the 300 win going from compresed to not compressed when the pressure comes it comes fast with little warning versus other go to powders for the 300 win. Was enough of a warning to me to put retumo to the side for my 300 win with the slowest powder that I now use being H-1000 and it does not show those issues in a sudden nature even though they are both close in burn speed in the 300 win case. Perhaps my stock of retumbo is a bit faster than average who knows. I had to rework all my H-1000 loads from a few years back as the newer lots I have burn faster than the powder I had been using. I won't post my 7828 load here as it is over Bergers max and a bit over Hodgdon's max with a 190 Hornady but has proven safe in my rifle and rips ragged one hole groups at 100 yards and is a consistant 1-1/2" 400 yard load.

If you would like my load data drop me a pm and I will send it to you.
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  #11  
Old 11-06-2013, 09:26 PM
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Re: Retumbo loads for 300 Win Mag.

Quote:
Originally Posted by Merlin View Post
I'm thinking about trying 185 vlds in my 300 win mag, I thought about using Retumbo, but can't seem to find any load data. If anyone is using this or nows where to find some load data, would like to know what your using or where I can fan find some.
Retumbo and a 300win... Good combo on 180 to 200 grain pills. work up 180's from 200 grain start loads from the hodgdon site. My brother was fond of retumbo with the 200 speer hot core in his #1 ss 300win; it was accurate enough that we were using it for prarie dogs when they'd only stick up their nose ( 1/4 mile +) and I couldn't touch them with my 22-250 pistol. Body shots through the mound were the norm.
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  #12  
Old 11-06-2013, 09:28 PM
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Re: Retumbo loads for 300 Win Mag.

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Originally Posted by raygross View Post
How do you post a thread?
Ray
back out to the sub-forum and find the new thread icon in the upper left part.
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  #13  
Old 11-07-2013, 12:14 AM
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Re: Retumbo loads for 300 Win Mag.

I use Retumbo in my 300 WM and get excellent results. My load is 79gr of Retumbo, Fed215, 210 Berger Hunting VLD's, .010" off the lands , Norma brass. I get 2902FPS and ES of 8FPS out of my 26" barrel. I have gotten good accuracy with the Berger 185's using 82 gr of Retumbo but did not measure the velocity. I would expect it to be 3050-3100. I would start a couple of grains lower and work up.
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  #14  
Old 11-07-2013, 06:18 AM
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Re: Retumbo loads for 300 Win Mag.

Retumbo also works great with 230s. I use 75.2 grains with the Berger 230 OTM to get 2825 fps.
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