300 RUM

[jbur13]

+ one more for Retumbo and the RUM. Shooting 230 bergers out of my Rem 700 Sendero. With a percision brake. I've tried ABLR's, Game Kings, ELDX's, but the berger shoots far better in my barrel. Just hope I dont run out of them before they make more.

 

[SilverbulletMAG]

++ on Retumbo for the RUM. I've also have good luck with 4831SC and H1000 but Retumbo has been pretty amazing with anything from a 150 Partition up to 220 pills and everything in between.

 

[Dosh]

JT, just finished testing loads for my friend's 300 RUM. Bedded his stock, he bought a TriggerTech trigger and a nice Vortex scope. Found this one shot excellent 200 yd groups with 210 Bergers, Retumbo and 215M primers. He lives in a very good area with lots of deer and elk, it will get a lot of use. Good luck

 

[Scottf]

A WHOLE BUNCH of recoil. A brake is your friend here.

Good luck on your new rifle.
I am shooting 208 ELDM with 90.5g H1000, at 3095 FPS.
I agree with the getting a break, it is no fun on the beach without one.

 

[Scottf]

Good luck on your new rifle.
I am shooting 208 ELDM with 90.5g H1000, at 3095 FPS.
I agree with the getting a break, it is no fun on the beach without one.

And I'm using 215M primers

 

[rsbhunter]

This is a group when I first started shooting, and I've had others that were an inch and under at that range. What I love is the Retumbo load does 3050 fps, and a custom turret, going between 100 and 600 yds is 100% on every time....and honestly, the recoil is about like my 6.5 creed with heavy bbl. I don't pull it into my shoulder hardly at all. I can't speak to a factory rifle, as mine probably is at 12-13 lbs.....if bbl life wasn't a concern, I'd shoot it every month, but I use it for big game.rsbhunter

 

[jasonco]

Good luck on your new rifle.
I am shooting 208 ELDM with 90.5g H1000, at 3095 FPS.
I agree with the getting a break, it is no fun on the beach without one.

My original intention was to make a 338 full length whatever?! But as it happened, this rifle shoots so **** well, I left it the hell alone as is, kind of?! 210 VLDH and 215 ELDX @ 3020-3050 FPS accuracy node, works just fine. I did start experimenting with R26 this spring and results were very promising.

 

[JJMoody]

Being as you have "enough" 8133 in hand, start there. The burn rate is in the sweet spot for a cartridge like that. Retumbo is great though. I did load development with another hot rod 30 last fall and used the 212 eldx. Great results. Your method of starting low and working up is good, however I might jump up in 1 grain increments on a RUM. 1/2 might not show much. Also liked the cci 250 primers ( because I had them). A brake will make you enjoy the process and save you money ( frustration) in the long run.208 will be good too.

 

[azsugarbear]

I found my best recipe to be with the 230 gr. Berger and RL33 powder. Unlike the other RL powders I have tried, RL33 does not appear to be very temp sensitive. It's hard to be beat this combo for LR hunting. But as others have said, you need to find what works best for you. In the end, personal accuracy can trump just about any bullet/powder combination out there. Best of luck to you.

 

[1stSgt]

A friend of mine swears he is shooting ragged edge out of his 300 RUM with the 175gr Barnes LRX. I have been testing them with mixed results. I am using 94gr of Retumbo pushing 3200fps but I am still not that tight. Any thoughts???

 

[brentc]

8133 will work very well. I'd expect to see 208s flying at 3100 to 3150 in the 700 LR. I'd work up from 92.0 grains to 95.0 grains.

 

[30calyooper]

I've worked with both a Rem 700 LR and a Browning A-Bolt LR Hunter in the 300 RUM, concentrating primarily on 180-190-200 grain bullets. While I've never tried 8133, I have had truly excellent results with both Retumbo and RL-25 paired with Federal 215 match primers...and if you are looking for some lighter practice and/or barrel break-in loads with more affordable bullets, IMR7828 gives pretty decent accuracy in loads that don't punish the shoulder. My records tell me that (in MY rifles) about 86.5 grains of 7828, a reasonably-priced 180 and any magnum primer gave me acceptable results in the power range of a 300 WinMag. Just be aware that in this combo, the bullet itself will quickly become the limiting factor - if it's not made to run at 3000 FPS from the muzzle, your accuracy will suffer. Therefore, you want to stay away from the cheaper bulk bullets like Rem PSP, though I have to say that the Sierras seem to work fine.

7828 has also worked well for loads with lighter bullets like high-quality mil-spec FMJBT's if you are so inclined, but expect to do a little bit more tweaking to find what works best in your launcher. Again, it gave me reasonable accuracy with loads producing energy in the 300 WinMag range. I have never really spent time experimenting with lighter hunting pills like a 150 but one of my buddies has achieved impressive accuracy with Berger 155 VLD's.

Honestly I'm not a big fan of muzzle brakes...even the heavier rifles will kick with a RUM but to me it's part of the price. I'd rather handle the recoil than the headache from earsplitting muzzle blast...and torturing others at the firing line has never seemed like a good idea.

 

[WildRose]

Hello, I'm new to the forum been shooting .308, and 7mag and reloading for them for a while. In the process of purchasing a .300 RUM, have dies 208 eld match bullets and an 8 lb jug of IMR 8133. Hodgdon helped me out with some sart load data but I'm wondering if anybody has any information they are willing to share as far as accuracy loads with this combo. I usually like to ask around before I start loading up bullets. Rifle is going to be a remington 700 long range.

Have not tried the IMR powders in the Rum's but have had great luck with H1000 and especially RL33 and RL26 behind 180-200gr bullets.

The best advice I can give you is that starting out be sure and follow your manufacturers break in procedure, don't get in a hurry and do it right and it will pay you huge dividends in the future.

More often than not you'll find your best accuracy loads are somewhere in the midrange of what the powder data gives you between minimums and maximums. If you have a good, consistently accurate load I promise the animals or targets you're shooting won't notice the difference between it and a max load.

 

[Orange Dust]

Have not tried the IMR powders in the Rum's but have had great luck with H1000 and especially RL33 and RL26 behind 180-200gr bullets.

The best advice I can give you is that starting out be sure and follow your manufacturers break in procedure, don't get in a hurry and do it right and it will pay you huge dividends in the future.

More often than not you'll find your best accuracy loads are somewhere in the midrange of what the powder data gives you between minimums and maximums. If you have a good, consistently accurate load I promise the animals or targets you're shooting won't notice the difference between it and a max load.

Yes, one thing the RUM has is plenty of power. It can rival little guns in accuracy, needed most in long range. My best loads are not quite max with most bullets, but still plenty fast.