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Joined: Sep 2006
Posts: 163
Campfire Member
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OP
Campfire Member
Joined: Sep 2006
Posts: 163 |
Friend of mine is wanting to build a 300 RUM/ AI and is having trouble finding load data. Does anyone have any experence with this round??? He's thinking about 200gr to 240gr bullets.
NEVER ARGUE WITH AN IDIOT. THEY WILL DRAG YOU DOWN TO THEIR LEVEL AND BEAT YOU WITH EXPERIENCE!
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Joined: Jul 2001
Posts: 60,161 Likes: 13
Campfire Kahuna
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Campfire Kahuna
Joined: Jul 2001
Posts: 60,161 Likes: 13 |
This is a joke, right? Like the letters college students used to make up to send to Dear Abbie?
“Montana seems to me to be what a small boy would think Texas is like from hearing Texans.” John Steinbeck
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Joined: Jun 2004
Posts: 44,863 Likes: 4
Campfire 'Bwana
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Campfire 'Bwana
Joined: Jun 2004
Posts: 44,863 Likes: 4 |
Last year a fellow guest hunter at a deer camp showed me his allegedly AI'd 300 RUM. He told me of the marvelous velocities he was getting, something like 4000 fps with 180s. I asked to see a piece of fireformed brass and he didn't have any on him. When I asked about load data he said he didn't load any yet. So I had to ask where the velocity numbers came from. According to him when the charge first ignites it generates enough pressure to form the brass to the vastly improved AI configuration. Then the remainder of the charge burns so much more efficiently that it gives the major velocity boost. mathman
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Joined: Jul 2001
Posts: 60,161 Likes: 13
Campfire Kahuna
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Campfire Kahuna
Joined: Jul 2001
Posts: 60,161 Likes: 13 |
Amazing--but he is not alone in this sort of theorizing. One custom riflemaker with a proprietary line of cartridges claimed much the same thing a few years ago. Or at least he did until one gun writer pressure-tested his ammo in a lab. Every load but one was way over 65,000 psi.
Apparently since then the RUM's and WSM's have pretty much killed off this guy's business, because I haven't heard much about his magic cartridges lately.
“Montana seems to me to be what a small boy would think Texas is like from hearing Texans.” John Steinbeck
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Joined: Dec 2003
Posts: 2,293
Campfire Regular
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Campfire Regular
Joined: Dec 2003
Posts: 2,293 |
I think some of the guys at the Pennsylvania Long Range Benchrest club used to use the 300RUM with some sort of "improvement" but I don't know the name of it.
***EDIT*** It's called the Tomahawk.
$bob$
Last edited by LDHunter; 11/30/07.
Many who have freedom have no idea where they got it....
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Joined: Oct 2006
Posts: 21,959
Campfire Ranger
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Campfire Ranger
Joined: Oct 2006
Posts: 21,959 |
The only 'improvment' I could think of for my 300RUM would be some kind of recoil reduction without resorting to a brake! :Grin:
"For joy of knowing what may not be known we take the golden road to Samarkand." James Elroy Flecker
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Joined: Dec 2004
Posts: 286
Campfire Member
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Campfire Member
Joined: Dec 2004
Posts: 286 |
This is a joke, right? Like the letters college students used to make up to send to Dear Abbie? Well, there is the 300 Tomahawk (AKA the 300 Rum Improved 35deg), amd a 300 RUM Improved 40deg *that I know of*, there may well be others out there. The Tomahawk adds about 4gr Water to the RUM case capacity
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Joined: Jul 2001
Posts: 60,161 Likes: 13
Campfire Kahuna
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Campfire Kahuna
Joined: Jul 2001
Posts: 60,161 Likes: 13 |
The big problem is "improving" the case in any meaningful way. The body is almost without taper already, and the shoulder angle is 30 degrees, so you're not going to gain any significant amount of case capacity by blowing out the shoulder to 40 degrees.
I suspect if anybody actually did this they would indeed find a way to get 200 fps more out of it. That is the nature of wildcatting, but it doesn't mean the 200 fps came from "improving" the case. Instead it came from another 10,000 psi!
At any rate, the way to obtain loading data for any such beast is to use data for the original .300 RUM as a starting load. Then keep adding powder until the chronograph indicates another 35 fps in muzzle velocity--because that's about what will be gained at safe pressures.
“Montana seems to me to be what a small boy would think Texas is like from hearing Texans.” John Steinbeck
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Joined: Dec 2003
Posts: 2,293
Campfire Regular
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Campfire Regular
Joined: Dec 2003
Posts: 2,293 |
Google 300 Tomahawk and you'll find that the long range benchrest crowd uses them quite a bit.
$bob$
Many who have freedom have no idea where they got it....
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Joined: Jul 2001
Posts: 60,161 Likes: 13
Campfire Kahuna
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Campfire Kahuna
Joined: Jul 2001
Posts: 60,161 Likes: 13 |
“Montana seems to me to be what a small boy would think Texas is like from hearing Texans.” John Steinbeck
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Joined: Dec 2003
Posts: 2,293
Campfire Regular
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Campfire Regular
Joined: Dec 2003
Posts: 2,293 |
Yep... But the practicality for the long range hunter is nill.
If someone truly needed more long range killing ability than a box stock 300RUM provided I'd think that a 338 Lapua would be a better choice.
$bob$
Many who have freedom have no idea where they got it....
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Joined: May 2005
Posts: 7,089
Campfire Tracker
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Campfire Tracker
Joined: May 2005
Posts: 7,089 |
Yep... But the practicality for the long range hunter is nill.
If someone truly needed more long range killing ability than a box stock 300RUM provided I'd think that a 338 Lapua would be a better choice.
$bob$ Long Range HunterThat's our Oxymoron for the day AGW
When truth is ignored, it does not change an untruth from remaining a lie.
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Joined: Dec 2003
Posts: 2,293
Campfire Regular
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Campfire Regular
Joined: Dec 2003
Posts: 2,293 |
LOL...
AGW... Good one...
$bob$
Many who have freedom have no idea where they got it....
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Joined: Jul 2001
Posts: 60,161 Likes: 13
Campfire Kahuna
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Campfire Kahuna
Joined: Jul 2001
Posts: 60,161 Likes: 13 |
Zing!
Apparently I am soon going to be invited to hunt mule deer next year with an outfitter who also runs a "long range" school. Am tempted to bring my .300 Savage with peep sight.
“Montana seems to me to be what a small boy would think Texas is like from hearing Texans.” John Steinbeck
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Joined: Jun 2006
Posts: 5,496
Campfire Tracker
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Campfire Tracker
Joined: Jun 2006
Posts: 5,496 |
If you need to improve a 300 RUM get a 30-378 simple, I don't understand some people...
1 and done
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Joined: Jun 2006
Posts: 10,084
Campfire Outfitter
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Campfire Outfitter
Joined: Jun 2006
Posts: 10,084 |
Seems like a lot of work for a small return
That which does not kill us makes us stronger
Friedrich Nietzsche
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Joined: Mar 2003
Posts: 6,935
Campfire Tracker
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Campfire Tracker
Joined: Mar 2003
Posts: 6,935 |
Seems like a lot of work for a small return The reward for the work is in the telling of stories about the magic cartridge, the equally magic rifle and the totally "magiked" hunt results. Especially if the listener seems to believe what is being told. <---humor jim
LCDR Jim Dodd, USN (Ret.) "If you're too busy to hunt, you're too busy."
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Joined: Jul 2001
Posts: 60,161 Likes: 13
Campfire Kahuna
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Campfire Kahuna
Joined: Jul 2001
Posts: 60,161 Likes: 13 |
If the gain in water capacity is ineed 4 grains or so, then the potential muzzle velocity, at the same pressure, is 1%.
“Montana seems to me to be what a small boy would think Texas is like from hearing Texans.” John Steinbeck
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Joined: Nov 2007
Posts: 1,408
Campfire Regular
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Campfire Regular
Joined: Nov 2007
Posts: 1,408 |
While I haven't seen the new 30TC cartridge in person, does it remind anyone of the .300 Savage with a .050" longer neck? Now this is real salesmanship!
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Joined: Feb 2004
Posts: 17,124 Likes: 3
Campfire Ranger
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Campfire Ranger
Joined: Feb 2004
Posts: 17,124 Likes: 3 |
Zing!
Apparently I am soon going to be invited to hunt mule deer next year with an outfitter who also runs a "long range" school. Am tempted to bring my .300 Savage with peep sight. Yea, and I would wear your "Floyd R. Turbo" jacket (red & black Plaid) too. gdv
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