300 RUM Berger 210 Load Data

[bh5k]

I am putting together a load for my new .300 RUM. I have load data for the 190 bullet weight, but I am wondering what your pet loads are for the .300 RUM using the Berger 210 VLDs? I have RL-22, Retumbo, H-1000, and US-869 on hand that I can use to work up a load. Thanks!

Bryan

 

[ultra707]

Hi Bryan,

My pet load for my 300 RUM with 210s:

91.5 Grains Retumbo
Federal 215M
Nosler Brass
and 210's loaded into the lands .005 then use the bullet concentricity gauge.
Velocity from my 30 inch barrel with my new lot of powder was right at 3200 fps this past weekend and shoots less than half an inch at 100 yards...Pretty hot load in my rifle so be careful!

Alan

 

[Elk Chaser]

My load is 93.5 grains of Retumbo under a 210 seated .015 off the lands. My velocity is 3180 out of a 28" barrel and has proven to shoot sub MOA out to 1,000 yards.

 

[trebark]

Your go-to powder is Retumbo lit by Fed215M primers in Nosler brass. Start out with a seating depth of .010 off the lands and start your loads around 88 grains and go up in .5grain increments. Once you find a powder charge that shoots well and has an decent ES and SD, then fine tune seating depth.

You can find some of my load data here: http://www.longrangehunting.com/forums/f53/my-300rum-mcr-70809/

 

[bh5k]

It looks like it is unanimous that Retumbo is the go to powder. It shot pretty good in my rifle, just figured since I was starting from scratch that I would give all of them a fair chance. I shot some 190 SMKs with 92 grains of Retumbo last Sunday and it was ok. Nasty crosswind made me not really consider the results good or bad. I had about a 1.5" group at 200 yards and dialed in elk kill zone sized rocks at 500 yards. I grabbed a box of Berger 210 VLDs last night and am going to try and stuff 5 rounds each with the different powders I listed above and see how it groups. Right now I am 0.015 off the lands. I haven't messed with the seating depth much yet to see how it affects accuracy.

Thanks for the loads so far!

Bryan-

 

[bh5k]

Your go-to powder is Retumbo lit by Fed215M primers in Nosler brass. Start out with a seating depth of .010 off the lands and start your loads around 88 grains and go up in .5grain increments. Once you find a powder charge that shoots well and has an decent ES and SD, then fine tune seating depth.

You can find some of my load data here: http://www.longrangehunting.com/forums/f53/my-300rum-mcr-70809/

Good looking gun trebark. My setup is faily similar to yours. I have a Bat action, 30" Bartlein barrel, Leopold Mark 4 8.5-25, Jewell trigger breaks at 1.5 OZ, A-5 black and gray stock.

 

[trebark]

Good looking gun trebark. My setup is faily similar to yours. I have a Bat action, 30" Bartlein barrel, Leopold Mark 4 8.5-25, Jewell trigger breaks at 1.5 OZ, A-5 black and gray stock.

Sounds like a badass shootin' stick. Post some pictures of it.

Although it wouldn't be bad to try all the powders you have in stock, I would lean more towards the Retumbo and H1000 as they are much more temp stable than the other two.

Remember to run all your loads over a chrono so that you can add velocity/ES/SD into the equation along with accuracy. I would rather have a load that shoots .5moa (at 100 yards) with an ES of 10 than a load that shoots .25moa (at 100) and an ES of 30.

 

[bh5k]

Got an email back from Berger and figured I would post if for everybody else:

[FONT=Arial, Helvetica, sans-serif]Load data was generated using Quick Load a 26 inch barrel a COAL (cartridge over all length) of 3.600 inches and your COAL and velocity could be a little different.
AS WITH ALL RELOADING APPROACH THE MAXIMUM LOADS WITH CAUTION AS ALL RIFLES AND RELOADING TECHNIQUES WILL BE DIFFERENT. If YOU CHANGE ANY OF YOUR COMPONENTS; THIS INCLUDES DIFFERENT POWDER LOT NUMBERS; YOU MUST REFIGURE YOUR LOADS BY STARTING WITH THE MINIMUM LOAD.
[/FONT]
[FONT=Arial, Helvetica, sans-serif][/FONT]300 Rem Ultra Magnum Bullet Powder Start Load Approximate Start Velocity Max Load Approximate Max Velocity Fill Ratio 210 Grain RETUMBO 82.5 2636 92.0 2913 99.5% 210 Grain RE-25 77.0 2637 85.7 2883 93.7% 210 Grain NORMA MRP 2 80.0 2663 88.2 2961 95.6% 210 Grain Ramshot Magnum 80.5 2622 89.6 2909 91.0% 210 Grain VIHT N170 82.5 2559 91.3 2848 100.4% 210 Grain H1000 80.0 2627 88.8 2899 97.6% 210 Grain H870 87.5 2639 97.0 2945 102.0% 210 Grain AA 8700 92.5 2569 102.8 2906 109.2% 210 Grain IMR 7828 SSC 74.5 2641 83.0 2908 87.9% 210 Grain RE-22 74.5 2636 82.8 2885 89.1% 210 Grain NORMA MRP 75.0 2647 83.3 2894 86.8% 210 Grain 50BMG 88.0 2561 98.0 2902 105.0% 210 Grain H4831 74.0 2600 82.0 2844 91.8%

 

[bh5k]

Argh, the table didn't come through correctly.

• Bullet Powder Start Load Approximate Start Velocity Max Load Approximate Max Velocity Fill Ratio
• 210 Grain RETUMBO 82.5 2636 92.0 2913 99.5%
• 210 Grain RE-25 77.0 2637 85.7 2883 93.7%
• 210 Grain NORMA MRP 2 80.0 2663 88.2 2961 95.6%
• 210 Grain Ramshot Magnum 80.5 2622 89.6 2909 91.0%
• 210 Grain VIHT N170 82.5 2559 91.3 2848 100.4%
• 210 Grain H1000 80.0 2627 88.8 2899 97.6%
• 210 Grain H870 87.5 2639 97.0 2945 102.0%
• 210 Grain AA 8700 92.5 2569 102.8 2906 109.2%
• 210 Grain IMR 7828 SSC 74.5 2641 83.0 2908 87.9%
• 210 Grain RE-22 74.5 2636 82.8 2885 89.1%
• 210 Grain NORMA MRP 75.0 2647 83.3 2894 86.8%
• 210 Grain 50BMG 88.0 2561 98.0 2902 105.0%
• 210 Grain H4831 74.0 2600 82.0 2844 91.8%

 

[bh5k]

Well, that is why we try different powder/bullet combinations. My gun is looking like it really wants US869. Shot both the 190 SMK and the 210 VLD better with US869. I need to spend more time with it, but so far off to a good start.

I need to put a caliper to the targets yesterday, but they are easy under .75 moa and at a quick glance I would say .50 moa. Need to spend some time with the chrony now.

Thanks!