300 PRC Sherman improved or 300 Remington Ultra Mag

The 300 RUM is an excellent single shot ELR hunting round IMO, more a dedicated set up and keeping round counts lower shooting a 230 Berger seated out in the 4 inch range. I've seen the 300 RUM move the throat fast enough that about the time your settling your ballistics things start changing so you have to shoot something like a 300 Win or WSM to keep on top of your form and shooting skills, honestly if I'm hunting and ready for a long range situation I'm wanting at least a few hundred rounds down range of my hunting load in my hunting area then I on average burn 100 rounds during season just to stay tuned, that takes the joy out of a 300 RUM fast, I've seen guys not even hunt with one before toast it!! your gaining like a 100-150 fps over the 300 SM with the 230 Berger for a LOT more powder but I've seen a LOT of 300 RUMs like the 3030 fps range with a 230 and not be able to reach any accuracy node over that which hurts for the powder burnt.
The 300 SM is an accuracy chambering, not just one designed to blow the biggest amount of powder down the barrel, the 30 SM IMO is perfection for the long range western big game rifle loaded with a 230 or 215 Berger and I think I'll run the 181 Hammer some too when I get one put together.
The 300 Norma Improved and the 30 Lapua Improved also solid choices and IMO better choices if you go to the RUM capacities, the Norma is a flat accuracy hammer and the Lapua really give you that next level performance with the 230 but you have to be on your game with it or you'll waste it's potential.
The 30 Nosler is awesome, I've built a number of them with the 215 and they do super well but for me the 30 Sherman Mag brings a couple key things to the table that I'm looking for when building a dedicated western hunting rifle that leaves nothing on the table in performance and function.

I really feel that the RUM capacity and greater really needs to be paired ideally with a 300 WSM so you can get your round count up and keep proficient for long range then pull the RUM's when the shot shows where it's truly an asset, blowing 20-30 rounds down range right before season is lame IMO and not really being prepared.

I wish I would have kept track of round count in my .300 RUM. I know it's North of 1000, and still sub MOA. If you don't abuse a RUM barrel, they last longer than most think. mtmuley

I've seen the 300 RUM done at 300 rounds, MANY in the 600-800 round range, there are always ones that go longer but it helps if your shooting close and hitting a pie plate is accuracy.
I don't see the point of blowing 90+ grains of powder down a 30 cal hole to kill stuff at a range that you could load the same exact bullet in a 308 and burn 40 grains of powder and have the same results. That's why the 300 Win, 300 WBY, 30 Nosler and 30PRC capacity cases are so popular, you get 98% of the performance, double the barrel life and less recoil. I can't count the times I've seen guys with a RUM that are running Win mag velocities and all they get out of it is to say they are shooting a RUM, burning more powder and enjoying more recoil. I've gone thought multiple barrels in all but the 375 RUM and the only ones really worth are the 338 and up IMO, below that and there are to many chambering that over all way out perform the RUM.

To each his own. I started with the RUM in 1999. I know what it can do, and how it fits for me. I don't know how a RUM can be burnt in 300 rounds. Explain please. And why would it help if "pie plate" was an accuracy threshold? Or shooting close? Glad we have choices. mtmuley

bigngreen said:

I've seen the 300 RUM done at 300 rounds, MANY in the 600-800 round range, there are always ones that go longer but it helps if your shooting close and hitting a pie plate is accuracy.
I don't see the point of blowing 90+ grains of powder down a 30 cal hole to kill stuff at a range that you could load the same exact bullet in a 308 and burn 40 grains of powder and have the same results. That's why the 300 Win, 300 WBY, 30 Nosler and 30PRC capacity cases are so popular, you get 98% of the performance, double the barrel life and less recoil. I can't count the times I've seen guys with a RUM that are running Win mag velocities and all they get out of it is to say they are shooting a RUM, burning more powder and enjoying more recoil. I've gone thought multiple barrels in all but the 375 RUM and the only ones really worth are the 338 and up IMO, below that and there are to many chambering that over all way out perform the RUM.

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I've seen a 26 Nosler done in 86 rounds, does that mean all of them are gonna do that? Nope.

The vast majority of RUM shooters aren't shooting a 215+ gr bullet so your OAL single feed argument is a moot point.

Those you listed in the same case capacity range are popular because of the .300 Winny, they are trying to do what it's done for decades but without a belt, and guys that want the "newest and greatest". But, they don't compare to the RUM, Warbird or 30/378, they are in a different league.

mtmuley said:

I wish I would have kept track of round count in my .300 RUM. I know it's North of 1000, and still sub MOA. If you don't abuse a RUM barrel, they last longer than most think. mtmuley

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I've shot out two separate 300 RUM barrels; one rifle made it 1000 rounds before I called it done (couldn't hold MOA at 500 yards) and the other was a 19" nitrided pistol that shot great right up to about 1100 rounds and then suddenly went off the cliff and opened up to 2 MOA. I'm 100% happy with the balance between barrel life and performance of the 300 RUM.

That said, I have a set of dies coming for the 30 Sherman Mag and I'll probably try that next. I don't think it's going to be any better than the 300 RUM (or straight PRC/Nosler/Dakota etc.) but it will be a bit different. I'm just looking for 2850 fps with a 210-215gr bullet from a 19" barrel and the RUM is a little bigger than necessary for that performance.

Blackaj: I haven't shot a barrel out yet. I have one with almost 700 rounds through it and it still shoots lights out with a 230 berger. Last time I had it at 1000 it held under .5 moa vertical with 230 bergers. Throat has moved about .025 so far. 28 nosler would have been close to .070 throat erosion. I just threw my load from my heavy rifle into my light rifle that's 10 lbs w optics. 1/2" vertical at 400 yds. Same load has shot lights out in 3 barrels.

Kind of a goofy question really

Of course the 300 RUM, by far & wide

The 300 PRC or any of its +2 gr imps will never stack up against it when everything is equal in regards to factory or imp. case dims, barrel length, throat/freebore configuration etc , in terms of velocity & energy ie. ballistic performance, all other arguments are just slanted bs in favor of a lesser cartridge, when it comes to long range "hunting" delivering a heavy pay load at the fastest velocity generating the most energy wins every time, some attempt the weak argument of "recoil" makes it difficult to shoot accurately .... for realz ? how many shooters were on the line at KO2M since it's inception with a 6.5 Creedmoor or .308 Win ? it's a worthless argument

Factory rifle, 26" barreled Fierce in 300 RUM, ammo loaded to operate from detachable magazine,

no frills or bs, just pure performance required for LR Hunting

Factory LR Hunting ammo requirements ?

This is with a 30" Bartlein 10 tw barrel screwed on to a Rem700 action, chambered in a SAAMI spec 300 RUM and dropped into a B&C stock with no other work, no bedding, no action blueprinting etc..

NOW if you take that same bullet and load it properly in a well set up LR rig then the sky is the limit.... then bring in the 240-250 gr 30 cal bullets and the 300 RUM shines even brighter

Very impressive velocity no doubt!
How do you feel about a 300 RUM in terms of the other LR requirements like Accuracy, and consistently?

I mean in terms of being able to put a fair amount of rounds down range to improve ones ability to make good hits In tough conditions.

I'm not a believer in having a really over bore magnum that I'd only shoot 40 rounds a year through, I want constant practice with the weapon I use for LR hunting.

Wouldn't the RUM be more of a PITA tweaking loads to keep up with barrel erosion?
Not to mention short barrel life in general?

Swamplord said:

Factory rifle, 26" barreled Fierce in 300 RUM, ammo loaded to operate from detachable magazine,

no frills or bs, just pure performance required for LR Hunting







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blackaj said:

mean in terms of being able to put a fair amount of rounds down range to improve ones ability to make good hits In tough conditions.

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What is a fair amount per year? It could be 100 for some people and 500 for others

Who is Sherman? Distant cousin of Ackley?

Swamplord said:

Kind of a goofy question really

Of course the 300 RUM, by far & wide

...... how many shooters were on the line at KO2M since it's inception with a 6.5 Creedmoor or .308 Win ? it's a worthless argument

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Unless your answering another question that I missed, the OP asked about what Cartridges would meet his requirements of 3150fps with a 212-215 in a 28" barrel.

This isn't a "what 30 caliber is best" thread.

And I tend to agree with Bigngreen regarding recoil affecting accuracy. This of course is relating to average shooters. King of 2 mile shooters are not your average shooters. I'd bet they send more lead down range in practice then many people do in a decade. I've seen great 6.5cm and .308 shooters totally shite the bed behind a 300wsm or 300 Win nevermind a RUM.

So, is there a benefit of shooting a cartridge larger then necessary to meet the requirements of the shooter?