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Old August 24, 2010, 09:00 PM   #1
TheGoldenState
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.300 Remington Ultra Mag vs .300 Win Mag

I am going to be helping out a buddy, YET AGAIN, and taking a good condition, Remington 700 chambered in .300 Win Mag with bipod and fluted barrel and Leupold glass, off of him in his unsteady fiscal times.

I already have a .300 Remington Ultra Mag. My question is what are the main differences in the two? My understanding is just that the 300 RUM burns more powder and a higher FPS, in comparison to the Win Mag???

whats the lowdown?

thanks
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Old August 24, 2010, 09:07 PM   #2
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http://en.wikipedia.org/wiki/.300_Re...Magnum#History

This Wikipedia page on it can explain it way better than me.....
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Old August 24, 2010, 09:26 PM   #3
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clicking now, thanks.
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Old August 24, 2010, 10:38 PM   #4
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It's essentially a twin of the .30-378 Wby magnum, with all that entails - extremely high velocities, ultra-short barrel lives (assuming full power loads), and way, way, way expensive and hard to find brass and factory loaded ammo. It's really difficult to rationally identify a "need" for this cartridge in field use in North America, save for the "gotta have it" factor (which none of us is immune to, btw).


edit: oops...sorry..you've already got the RUM, which means you're no doubt acutely aware of what I typed above. What you'll get with the .300 Win Mag is more sedate velocities, but longer barrel life, and much wider assortment of factory loadings at more reasonable prices, as well as cheaper and plentiful brass should you roll your own.
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Old August 25, 2010, 12:02 AM   #5
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CS,

thanks for the reply, thats what i was looking for. As for the 300 RUM. You are 100% correct. I have other 308's but the RUM was something i just "had to have," knowing full well it was over kill save me going to Africa-which is highly unlikely but hey…
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Old August 25, 2010, 01:48 AM   #6
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From the information, I've found, RCBS.load, Barnes, and Speer manuals, the 300 Rum is more similar ballistically to the 300 WBY, rather than the 30-378, The RUM holds 13% more powder than the 300WBY, the 30-378 holds another 20 grains on top of that. I reload for 300Wby, 340WBY, also. I think that there is more to be said for freebore than most people want to hear. The quality of the components is a factor also. Weatherby brand ammo is made by Norma, is more expensive and IMO absolutely superior to commercial American brands, that I've tried. I think Lapua may have made brass in 300RUM. I found some Remington brass in 300WBY cheap compared to Norma. I tried a load that I've used w/o sign of extreme pressure in Norma brass, in virgin Rem brass that showed a compressed primer on 1st round, and missing primer on the second. This load I took from Hornady's data on RCBS.load. It was a 190 JSPBT, 86.5gr? RL25, CCI 250 primer. It chrono'd about 3100fps with the Norma brass no signs of pressure. The same load in Rem brass chrono'd ,between the 2 rounds fired, about 3010fps. Go figure? Needless to say I pulled pullets on all the rest, there were only eight. Will try a starting load with the Rem brass. I have much faith in the Weatherby action.
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Old August 25, 2010, 11:28 AM   #7
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I believe Mapsjanhere shoots one. Everything I've seen or heard is a lot more powder, a LOT more recoil, and much shorter barrel life for about 150fps.
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Old August 25, 2010, 04:13 PM   #8
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IMHO, the cost of ammo is the big difference.
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Old August 25, 2010, 04:14 PM   #9
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I dont have any 300 Win Mag ammo, is the brass the same size for both?
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Old August 25, 2010, 05:08 PM   #10
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I shoot a 300 Win mag, a Savage Action Shilen Barrel throat-ed for 210 Bergers. It shoots better than me and I am chasing the mile (1740 yards) mark with it.

Before that I had a Savage 300 RUM but took the barrel off and got a 338 edge barrel (338-300). The RUM will do everything the 300 win mag will do but better faster and more destructive.

Originally I shot the 300 RUM the recoil wasn't god awful but it wasn't a 223. I shot the 1000 mark with less come ups and less wind just by a little. A lot of fun but if you shoot lots of rounds its not worth it. Either way I never had problem getting brass and bullets for either caliber.

By the rum and re barrel to a 338 edge. shots from 0-2000 yards assuming you have the skill and trigger time, and enough energy to kill an animal ways out there.
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Old August 25, 2010, 09:20 PM   #11
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thanks for the post and info Kdog.

Im GREEN when it comes to rifles outside of plinking with .223 and .22

I have the big boys but am a fish out of water with them. I honestly can imagine a 1700yd shot. How the hell do you even see the target????

so much goes into a shot like that i would imagine.

As it stands at 5 o clock today i own both the 300 RUM (previously) and the 300 Win Mag. I figure i am good with anything up to the size of an elephant? and no ive never been hunting but i want to REAL bad. At least i am prepared lol

for any deer/hog hunts i get to go on in the near future i hope, i will use one of my .308s (BAR or rem 700).
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Old August 26, 2010, 02:43 PM   #12
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As GT mentioned, I went for the 300 RUM. For me the non-belted cartridge was the reason, easier (at least for me) in reloading. You can download the 300 RUM to pretty much the same speeds as a hot 300 Win, so I've to admit I can't see a reason to own both, unless you plan to go on a foreign hunt where 300 WM might be easier to get than 300 RUM.
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Old September 3, 2010, 04:11 PM   #13
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lol...300RUM CAN OF WOOP ASS...

REAL SIMPLE...300 RUM = 14" GROUP @ 1,700 YDS, it took me 3 rds to get on target, next 5 in 14", 180 gr sierra match king b.t. 94gr of H4831sc.
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Old September 3, 2010, 05:12 PM   #14
edward k
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I have owned a 300 win for about 3o years now. It will shoot like crazy. I bought a 300 rum about 10 years ago and sold it a year later. Both guns had 24 inch barrels and the rum could only acheive 50 fps more before bolt got sticky. I could see no reason for the extra everything for only that much difference. My experience only but thats what it was. ED K
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Old September 3, 2010, 05:45 PM   #15
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thanks for info/experiences.

YOu guys confirmed what i thought i already kind of new

Would the 300RUM be acceptable for say buffalo in Africa (maybe one itlll happen lol).
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Old September 4, 2010, 05:07 AM   #16
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While it would probably do the job with the right bullet, it's not going to be legal. The minimum for dangerous game in most parts of Africa is a 375. For cape buffalo, there is no such thing as an overkill when it comes to guns. Better to have too much gun then not enough especially when an animal has the capabilty to stomp you into a grease spot.
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Old September 4, 2010, 03:33 PM   #17
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As long as its your shoulder and not mine, go for the Rem ULTRA because it has greatest recoil.

Jack
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Old September 9, 2010, 02:13 PM   #18
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I also recomend you find some one that can alow you to shoot their 300 before you purchase one.

Last edited by adcat; September 9, 2010 at 02:20 PM. Reason: posted 2 tims on acident.
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Old September 9, 2010, 02:15 PM   #19
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Not for everyone?

The 300RUM, it will stop anything on this planet, bullets vary from 110 gr to 220 gr, and velocity varies from 4k to 2,6k, it also has the least amount of bullet drop over any cartage commonly found any where in the world.
Unlike 95% of anyone whom I have talked to I love my 300 RUM it defiantly STOPS JIHAD ON CONTACT. How ever if you are considering one, get a custom muzzle brake and do your homework! They are all different, the one I have reduces recoil by 47% (from the average of 50lbs). I also do not recommend using it for game under 500 lbs the damage to a animal is significant, it is a very good round for ANY dangerous game (something that will kill you if given the opportunity) . My actual field ballistics tests have been ; 500yds- 3” bullet proof glass 5 plastic layers = pass, completely through glass & removed threat, Two telephone poles 10yds apart @ 250yds = pass, bullet reached target. On far side of the poles. 5/8" mild steal 300yds = pass. although the 300RUM is not for all I think it has its use.
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Old September 9, 2010, 02:21 PM   #20
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Quote:
My question is what are the main differences in the two?
....A bruised shoulder and a broken collarbone.
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Old September 9, 2010, 09:17 PM   #21
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The 300rum is better but...

300 rum has a better designed case than the 300 win.

There is no need for a belt. The OAL of a 300 win mag limits is usefulness with bullets over 165/180 grain. This can be fix by increasing the freebore as long as the magazine well will hold to load longer 200+ grain cartridges or one is willing to load rounds one at a time.

The biggest problem with ether the 300 RUM or the 300 WIN is the need for a barrel long enough to burn the increase powder charge. A barrel needs to be 26-28" to reap the benefit of 70 plus grains of powder in a 308 bore. For a bench target rifle this is not a problem but, most hunters want a more compact rifle with a 24" barrel.

What is the point of having a 30 caliber Magnum if one is limited to 180 grain or lighter bullets to gain a major advantage over a 30/06?

A 300 mag should launch a 200 grn bullet over 3000 fps to justify replacing a 30/06. The reason is wind drift. A good range finder can allow a shooter to dial in the trajectory out to 800-1000 yards. It is much harder to guess what the windage will be across that distance. Longer heaver bullet do not drift as much as lighter bullets.

(ok that was nearly a rant)
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Old September 10, 2010, 03:08 PM   #22
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the exact diffrence.

sorry for all of us gun junkies goinig on.... the exact diffrences will be the easily compared in a reloading manual, compare the 2 rounds and = bullet weights, then at the top of the page you will see the exact diffrences in size comparson. for ballistics refrence the 2 on the internet and you will see all of the rest, bullet drop & stoping power.
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Old September 10, 2010, 03:23 PM   #23
TheGoldenState
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Quote:
The 300RUM, it will stop anything on this planet, bullets vary from 110 gr to 220 gr, and velocity varies from 4k to 2,6k, it also has the least amount of bullet drop over any cartage commonly found any where in the world.
Unlike 95% of anyone whom I have talked to I love my 300 RUM it defiantly STOPS JIHAD ON CONTACT. How ever if you are considering one, get a custom muzzle brake and do your homework! They are all different, the one I have reduces recoil by 47% (from the average of 50lbs). I also do not recommend using it for game under 500 lbs the damage to a animal is significant, it is a very good round for ANY dangerous game (something that will kill you if given the opportunity) . My actual field ballistics tests have been ; 500yds- 3” bullet proof glass 5 plastic layers = pass, completely through glass & removed threat, Two telephone poles 10yds apart @ 250yds = pass, bullet reached target. On far side of the poles. 5/8" mild steal 300yds = pass. although the 300RUM is not for all I think it has its use.
Thanks for the GREAT info. 500yds passed thru proof glass? WOW.

BTW since i think people are reading the title and not the post

I now have BOTH the 300 RUM and 300 Win mag. I have shot NEITHER. The winmag i just got and the RUM, well the RUM got bought mounted with Leupold glass and put in safe Paper punching and future hunts will be done with the .308s
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Old September 17, 2010, 10:27 PM   #24
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Anyone interested in two boxes of Remington 300 Win Mag 150 gr core Lokt? My buddy bought me Winn Mag instead of Ultra so now I am trying to get some of my money back. I paid $55 for both boxes and are willing to sell for $40. Send me an email to jra321@hotmail.com if interested. Thank you!
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Old November 17, 2010, 03:36 PM   #25
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.300 RUM

For some time I have read posts on this site regarding the .300 RUM. For some time there was a brand spankin' new left hand 700 sitting on a shelf speaking my name. I am 61 and finally gave my old '06 to my son, which is now 40. I wanted a 30 cal replacement but not an '06 since I am not going to reload for him, as I did for myself. I AM a reloader. So, when that rifle got down to a price that was absolutely ridiculous, being also left handed bolt as I AM left handed, regardless of all the PooPooing about the rifle I bought it.
I have never been more happy with a rifle in my life! It is my first left handed gun and certainly the first mag I ever owned. It spirts a 200 gr accubond out at over 3,000 fps and will do so at subminute. The greatest thing about it is I can use the wide array of 30 cal bullets, load it up or down and it shoots like a ray gun, really. I am 61 have had quadruple bypass surgery and last April a heart attack. It does Kick! No doubt about it. At my first sitting I fired 30 rounds of level 3 ammo of Remington's. Yes I was sore. But I enjoyed every minute of it. I am 5'7" and weigh 185. Not a big guy. I am not saying it is the gun for everyone. But I don't regret one minute of buying this caliber. I can go up or down as I want and have a gun that is adequate for all of North America and plains game in Africa or load it down and just whack my favorite, Texas white tail. I will be dead before I burn the barrel out of it, too. Just wanted to share this, to anyone interested in this fine caliber.
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