Anyone use Retumbo in the 7mm RUM?

[RevJim]

 I have a good load in my 7mm RUM using IMR 7828 under the Barnes 140 TTSX. I am going to work up a load with Retumbo and the same bullet for late season cow elk ( read "cold) and I like the Hogdon Extreme Powders for that.
 I see Hogdon's data list 96.5 or so as a Max. I am just checking to see your results. I have used Retumbo in a 300 RUM/200gr, but I have found the 7mm RUM to be a bit more finicky in load workup. Just checking if anyone had any problems, etc. I sold my 300 RUM, so after I get a good load made up, I am putting the Leupold 4.5x14 CDC on it, and have a custom turret made up for that load as well. Should be alot of fun anyhow!

[shot1]

Retumbo works great in my 264 Win mag so is should do the same in  your 7 rum.

[RevJim]

Thanks Shot1- I am going to load some up today and shoot later.
 
PS "Later that night"...I can tell this Retumbo is going to work just fine. I was concerned about a compressed charge, what with up to 96.5 gr and the long Barnes 140 TTSX. I don't have a Lee FCD for this round, and didn't use one for the 7828 loading, but had plenty of room. I like to use a FCD with the Barnes x, as I feel it gives it a more consistent "bullet pull", and also keeps the compressed loads from puhing the bullet out, increasing COL. I used a 4" drop tube, and I had powder up to the shoulder with top load. My Hornady dies create alot of neck tension, so I am set. Hopefully, I can get out to the range this pm.

[giddens1972]

Good Morning
 
When I had a 7RUM, I tried some retumbo.  It worked but I was never able to get the advertised velocities.  I ended up having a 270 Weatherby built on that action, because the 7 was shot out after about 250 rounds.
 
John

[RevJim]

 Well, I have heard they are barrel burners, so I don't shoot mine very much, ha. Today I got to the range, and was able to work up to Hogdon's Max load of 96.5gr. I have a tight Shilen 26" bbl, and I got 3632 fps av with these Barnes 140 TTSX! Best part, all three went into a 3 shot av. of .65", new RP cases, Fed 215M primers, scope on 9x. I have a single set trigger, so I was able to "finesse" those 3 shots, all from a cold barrel. I shoot this thing very, very slowly, ha.
 I also shot my 35 Whelen AI with the new Barnes 200 TTSX ( I have been shooting the old 200X over 58gr/H322/2970fps for over 10yrs) got .69" for 3 shots, 58.5gr/H322/2950 fps , fireformed RP cases and BR-2 primers. Not bad for an old warhorse!

[Sourdough]

I have a 338/378 Weatherby, very similer to your Ultra Mag, in that it has a large case.  I use IMR-7828.  I tried Retumbo due to the temp extreames we have here in Alaska.  Did not like the loads I got using the Retumbo in Weatherby Cases.  I just was not getting the consistancy with velocity that I was looking for.  Went back to the IMR powder.

I have since found a good use for Retumbo.  I got a 25-06, decided the 110gr Nosler Accubond was my optimal bullet.  Looking through the Nosler Manual for a good powder, that gave good velocity.  Retumbo was the leader of the pack, Highest velocities through out all the powders listed.  Worked up loads using Retumbo for the 25-06 and love the loads.  The velocities and energy produced make 600 and 700 yards shots very doable.

[JD338]

I am loading the 7mm RUM with a 160 gr AB and 93.0 grs Retumbo in a M700 LSS. Accuracy is under MOA and MV is 3318 fps.

JD338

[Lloyd Smale]

whats a 160 ab?

I am loading the 7mm RUM with a 160 gr AB and 93.0 grs Retumbo in a M700 LSS. Accuracy is under MOA and MV is 3318 fps.

JD338

[shot1]

160 Nosler Accubond is the bullet he is using.

[Lloyd Smale]

just picked up a 100 once fired 7mm ultra mag brass and i dont even have a gun. Its one thats on my short list though and the price was right. I had crap luck with barnes bullets this year shooting deer but did shoot a couple with the 140 accubond nos out of a 7rem mag and it performed real well