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You really haven't been paying attention, have you?

There have been many reports of poor feeding, though I have owned at least 10 of them and have also seen no problem.

It is true, however, that they don't feed as smoothly as a 30-06 or other slimmer rounds with more generous body taper and less acute shoulder angle.

As far as magazine capacity, I don't place much value beyond the third round myself, but a lot of guys on this forum do.

Either way though, it appears that performance of the RCM rounds will be very close to the 30-06 and 338-06 in handloaded form due to limited case capacity.

With no performance advantage, you really have to LOVE short actions to jump in.

_


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.... just buy a .325 WSM. It's a proven round... as much as a WSM can be anyway... and it'll do the same dang thing!

-jeff


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I'm not an old sourdough, but the time I was charged by a griz on Kodiak, I recall thinking that more rounds would be better than less rounds.

I never ever want to be afield with a rifle that does not feed perfect every time.



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The RCM has potential to be a smooth feeder. Belted mags--gun scribe rantings aside, typically feed very smoothly. Crud, my M-70 375 H&H will feed and chamber empty cases. A belted mag is nominally .532 at the rim and the belt.

The WSMs have had their share of feeding issues. They have a nominal .550 head diameter.

The RCM has a head diameter of a belted mag. Since the belted mags feed well, an RCM would seem to have a good chance of feeding well too.

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I think it has more to do with quantity and angle of the shoulder. WSM's, at least, have a steep, long shoulder... but I don't know fer sure that that's the reason they can be balky, just a guess. FWIW they AREN'T balky feeders in the two WSM's I have- they are fine.

-jeff


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My 7mm Rem Mags and 300 Winnys and 340 Wby all fed very well too, as did my 375 Ack with it's 40 degree shoulder. There is some relationship between the diameter of the case, it's taper, and the shoulder angle. I am not sure where the break points are, but a fat case is not a help.

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The most recent Rifle Shooter states the water capacity for the RCM's is 68-72 grains, while the 300 WSM holds 79 grains, if it helps your thesis.

Last edited by supercrewd; 11/27/07.

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Will the brass be made by anyone other than Hornady? Kinda pricey compared to Remmy and Winchester. Not an issue for some I guess.


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I would like to interject the size and shape of the .416 Rigby case into the argument: .589" head size, 2.90" length overall and a 45 degree shoulder angle.

I have not seen one that did not feed well (of course I am not the warranty repair point for same).

I resisted the .300 WSM and .300 SAUM , but I intend to give the .300 RCM a test drive. It has some virtues for me.

jim


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Originally Posted by supercrewd
The most recent Rifle Shooter states the water capacity for the RCM's is 68-72 grains, while the 300 WSM holds 79 grains, if it helps your thesis.
I just remembered that the Barnes #2 manual lists the case capacity of each cartridge using water. They list the following:
  • 350 Rem Mag - 73.74 gr
  • 35 Whelen - 72.63 gr
  • 338/06 - 73.17 gr
  • 30/06 - 68.01 gr
With the 350 Rem Mag available in my opinion there is no good reason to do a wildcat on the RCM case. Using the WSM case would get some what more velocity and may be the way to go. I wonder what would happen if Hornady used their "special" powders in the cartridges listed above. An interesting thought.


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Thanks for that information. Now I can rank them and just a 30-06 case capacity is not a new invention. There is very tough competition at that capacity level. The 30-06 Springfield for instance.

Unless a cartridge will fit in a true Featherweight contour barrel I would just as soon have a WSM and get a standard barrel contour.

The Kimber Montana goes only 6.1 lbs with a 24" barrel.

I am listening but so far I see no real use for this new round. I have already forgotten its name! LOL

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Originally Posted by Brad
Geez Kute... I think I'm approaching Curmudgeonhood grin


It's called "Apprentice Curmudgeon". I just entered the program a few years aog grin


Casey


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Not being married to any particular political party sure makes it a lot easier to look at the world more objectively...
Having said that, MAGA.
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Do I even want to know at what age I should expect the letter from the Apprentice Curmudgeon folks? Jeez... one more group to join... do I at least get some free ibuprofen or something?

-jeff


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after firing a 5 1/2# 350.. 225's @ 2700 will knock your socks off... fun but mostly entertaining to bystanders... the 350 mag rocks.... whatever turns the wheels though..... that is what this is all about....

enjoy

woofer


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OK, I gotta ask this - what does this new Ruger cartridge do that is different from the 284 Win cartridge? Capacity about the same as an '06 in a short action cartridge. Is there something else here that I am missing, besides the proprietary powder/loading of Hornady?


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cant re-sell the 284 smile

woofer


"I would build one again, if it were not for my 350RM (grin)."

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Got it, that's what it sounds like to me. Wildcat a 338-284 or a 308-284 and I'll bet you'd have the same capacity as these new ones within a couple of grains.


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I beleive the case capacity listed by Rifle Shooter magazine is going to turn out to be a bit low .

Otherwise , these new cartridges are not going to come anywhere near their published speeds , special powders and loading techniques not withstanding . Particularly out of a 20 inch barrel .

The RCM case will be fatter than a 350 Rem. mag , so it just about has to hold more powder than that case........

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The 350 RM's shoulder is farther ahead compared to the RCM, might make up for the slightly fatter case.

Last edited by gerrygoat; 12/02/07.

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Originally Posted by bludog
OK, I gotta ask this - what does this new Ruger cartridge do that is different from the 284 Win cartridge? Capacity about the same as an '06 in a short action cartridge. Is there something else here that I am missing, besides the proprietary powder/loading of Hornady?


1) A non-rebated rim (if you care about that kind of thing).
2) This isn't in reply to your post, but compared to the WSM's, potentially one more round of mag capacity and smoother feeding.

From early appearances, it looks like the 300 RCM would allow for a 30-06 +P out of a short action with a relatively short barrel - that'd be a good thing. It's too early to tell, though, so I'd at least give the round a chance to prove (or disprove) itself.




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Some shooting knowledge: Don't stand in front of the muzzle. Some hunting knowledge: Too much noise ruins the hunt.
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