300 RUM - Sharing of load data

[whacker1]

My wife bought me a Remington 700 XCR in 300 RUM for my birthday last week.  I am asking if anyone is willing to share their successes with loads for the 300 RUM.  I have several friends that shoot these currently and I am happy to share some of the information.

Here is what I have learned so far from friends and some other forums:

H 1000 is the powder that most folks are having the most success with for accuracy and still maintaining velocity.  It appears that most folks are between 92 - 100 grains - which I believe is getting to be overpressured at 100 grains.

Biggest complaint is with Remington Brass lasting as short as 3 loads and as many as 6 -7.  But it seems no one is willing to pay the money for more expensive Nosler Brass, Does anyone know if Nosler Brass holds up any better?  I was just about to buy brass, but Cabelas was sold out and it appears that Nosler Brass is backordered a few weeks. 

I have heard a wide array of bullets, but most folks seem to come back to 165 - 180 grain bullets. 

The only other feedback I was given that I thought worth sharing is that a couple of my buddies have gone to Vais Arms, Inc muzzle brakes to reduce recoil and improve accuracy.  I posted this information on another thread if anyone wants to view it - Thread - "Which Brake?"

Anybody like to share on this subject?  it could save me some significant time and money in getting this ironed out. 

Thanks!

Neil

[high country]

I have had good luck with imr 7828 and aa8700 both powders shot well in both of my ultra's. bullets....180tsx has put down a lot of game for me as well as the scirocco. the 165gr hpbt sierra is an amazing coyote round when you send it on a 3800fps journey. I did that before there was any published load data

I have loaded up to 116grs of 8700, but you have to swirl it into the case and you cant seat a tsx very deep....but they go like hell

[Red Dawg]

This is what I shoot out of my Model 700 CDL. 77 grains of IMR 4350, Remington brass, Fed. 215 primer topped off with a 200 grain accubond. It will lay out there at about 2900 fps. I found that my rifle is much more accurate with a little slower load and it also kills much better. I have done a ton of research and the rum is best suited with a large bullet. And if you get this round up over 3000 ft it will rip your animal to shreds. Believe that. I use Remington brass and they seem to be holding up quite well although if you can afford the nosler brass it probably wouldn't hurt. You will find appone doing some shooting that a 200 grain will shoot much better downrange than smaller rounds. At least with my tests.

[high country]

I guess I would need your def of "rip your animal to shreds" I have a fair number of kills to my RUM's and honestly they just smash a hole in em like my 270 or 257 does, just a wee bit bigger.

[Red Dawg]

I have one kill with a softball size entry hole and one where it completely blew the shoulder off the animal. That is why I slowed it down. Much more effective killer as it will transfer energy much better.

[dbllunger]

Only loaded for two different 300RUM's so far a custom and a stocker.  

Remington Brass, CCI 250, 97-98gr Retumbo, 180gr Nosler Partition.  I have a lot of brass with five fires, and it looks perfect with no trimming done ever.  I neck size only starting with new unfired brass, and have not had to FL size yet in the custom.  

One rifle is a stock 700 shooting 97gr at 3360 with a brake and holds right at .5/3 @ 100yds. The stocker shoots SAMI spec OAL, and the custom OAL is different.  OAL data is in the shop but can get it if you want.  Stocker only one bullet type was tried, but the custom shoot's four different 180's almost exactly the same.  The custom (Lilja barrel) has no brake at 3400 into .5 also.  Chronographed velocity not book.  

165's in the custom go up to 3600, but groups open up to .75-1.00 depending on bullet.  

As far as killing goes I have had three extremes on Elk, and deer it just slams down with one shoulder ruined.  If was so worried about damage or killing power, I would go to a .243 shooting the least expanding bullet I could hunt with. 
 
One spike shot from back to front literally into hip 2" deep, into ribs, out of ribs, across shoulder, along neck, through base of one horn.  Alert and running.  Looked like a grenade went off from the hair that flew off but he dropped in his tracks.  Just a nasty groove the entire length of him probably fatal but only because of injury and time of year.  It required a neck shot to kill him.  165 Partition at 3600fps/200yd shot.  Almost no meat loss.

Another Spike at 23yds, in just beind front shoulder, and out between last rib and hind quarter on opposite hip.  Dropped in his tracks.  165 Lost River at 3400fps.  No meat loss.

A good long tined 5x5.  In the front point of the shoulder and out the front edge of the offside back hip.  Bullet recovered almost through the hide.  Pretty much ruined the shoulder with about 25% edible, but minimal damage to rear ham.  Dropped in his tracks.  Alert and had just ran a short distance.  180 Partition at 3360/350yds.

I mentioned alert because in my experience animals that have no clue they are going to die tend to drop in their tracks faster then one spooked or ready to take off. 

[ICEMAN]

Thanks for starting this one.... I finally have enough brass to justify loading for mine. Added to my favorites...

[whacker1]

Interesting comments regarding the Alert vs. not alert... I have never compared the two.  I am sure that I will start making note to see what the difference is going forward.

Thanks!

Neil

[257 Wby Mag]

I was loading 96 grains of RL 25 for a pard, Rem hulls, Fed 215 Mags', 180 Swift Sciroccos', @3460 average, few ripped a hair over 3500. Rifle was a Rem Sendero. That gun would put 3 of em in a 3/8'' on a bad day...

[haugenna]

I was loading 96 grains of RL 25 for a pard, Rem hulls, Fed 215 Mags', 180 Swift Sciroccos', @3460 average, few ripped a hair over 3500. Rifle was a Rem Sendero. That gun would put 3 of em in a 3/8'' on a bad day...

Any pressure signs?

Might be a typo, but what is "pard"?

I have the 300 RUM Remington 700 LSS.  Is that a similar action to the Sendereo?   

[257 Wby Mag]

Pard, would be, a hunting partner. No preasure signs, no ripped to shreds, bucks, bulls, or grizz, just bang-flops.

The LSS has the same action, different snout. The Sendero has a heavy fluted snout, synthetic stock. Pard has a LSS 257 Wby Mag, its a shooter...

[dbllunger]

Latest update...small 6x6 alert and leaving the area quickly walking.  First shot 380 yds in one side and out the other taking a rib each dbl lung.  He started running and second one in right next to first, lung, liver, paunch, and out at the last rib on opposite side but not through the hide.  Bullet recovered with a chunk of bone in it.  180  Nosler Partition @ 3400.   257 I have never been able to make one go that fast without blowing primers.  Actually gained FPS by backing off 1 gr after punching primers. 

[haugenna]

any other info on this cartridge floatin around out there?

[lazydrifter]

check this out

http://www.realguns.com/loads/300UM.htm

[haugenna]

check this out

http://www.realguns.com/loads/300UM.htm

No Retumbo on that site.  Since I have 24lbs of it,  I would like to make it work