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30 CODY EXPRESS

 
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  #1  
Old 07-03-2002, 11:59 PM
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30 CODY EXPRESS

Has anyone heard of or had any exprience with this round? 250gr at 3900fps from a 34" barrel using a 1 in 9 twist and up to 4000 fps with 110grs. Darryl how does that compare with your TOMAHAWK or anything else that you know of that can do double duty? Not counting the 408 since it can't be use in competition.
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Old 07-04-2002, 07:15 AM
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Re: 30 CODY EXPRESS

Texas

Questions.

3900 FPS with a 250 gr 30 cal bullet???? A 20mm cannon neck down?

110 grs of what? If it's powder you were talking about, that amount will not give the velocity you mentioned.

Brand of 250 gr bullet? What BC? I would think it would be a 240 gr MK. unless it is a special custom bullet of Warrens. Then again 110 grs of powder will not give that velocity unless it's rocket fuel with boosters added.

Case used to achieve that velocity? It would have to be in the 150 to 175 gr powder volume size, at least and probably MUCH more.

Something like that would be a lot more overbore then the 30/378 is.

More info needed on it like, who made the claim and who did the testing.

The 408 is legal for competitions. Rules state that it must be no larger then a 40 cal. ---A .408 diameter IS a 40 cal. It ceases to be 40 cal when a bullet reaches 41 caliber or .410 diameter. Just like the 308 is a 30 caliber.

I think at 3200 FPS with the Tomahawk and 240 gr bullets that's about right for the 30 Cal bore and factory mag actions. You could neck the 505 Gibbs case down to 30 cal and give more powder volume. I would rather neck that case down to 338 and shoot the 300 gr MK in it. Then again, you will need big custom actions to use it.

For the regular hunter and shooter who wants a big 30 cal that will certainly do everything needed in a 30 cal. on a factory action, the Tomahawk fills that nitch.

DC

[ 07-04-2002: Message edited by: Darryl Cassel ]
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  #3  
Old 07-04-2002, 02:56 PM
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Re: 30 CODY EXPRESS

Sorry I left some info out: 250gr bullet loaded with 85.0grs H-4831 powder. The parent cartridge is a 416 rigby. If you have a book called "Cartridges of the world" its listed on page 182. I'm trying to contact the man who came up with this round to get more information.
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Old 07-04-2002, 03:52 PM
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Re: 30 CODY EXPRESS

Texas

The 416 Rigby Imp and the 378 Weatherby IMP have the SAME case capacity.

I shoot 122.5 grs of WC872 in my 338/416 IMP and a 37" barrel and that gives me a top speed of 3310 FPS with a 300 gr 338 bullet. It will be from 3278 to 3310 FPS with that powder charge.

I have to question the velocity of "only" 85 Grs of 4831 and the 250 gr 30 cal bullet. I shoot 78 gr of 4831 in my standard 300 Weatherby 1000 yard match guns with 220 gr bullets and the velocity is right at 3040 FPS. I'm only 7 grs less of the same powder. You think for a moment that that guy is pushing a 30 gr heavier bullet at 3900 FPS with that?? NO WAY

I have had many 30/378 Weatherbys and have friends who have the 30/416 IMP and they can get no where near that velocity out of a 250 gr bullet. They have long barrels too at least 36".

That fellow will have to show me that load being shot over an Oehler Chronagraph and with only a 34" barrel pushing a 250 gr bullet at 3900FPS using 85 grs of 4831-----NO WAY. Maybe he has a "Chrony" chronagraph?

It's hard to believe what some publishers allow to be printed in their books before first testing it out and proving what has been said.

I would do this, I'll put my Tomahawk up against the 30/416 Imp with him using 250 gr bullets and 85 grs of 4831 and me with 240 Gr MKs and I don't believe he will be ahead of me in velocity. I use 104 grs of 872 in my Tomahawk Now if he shoots 125 grs of a slow powder behind that 250 gr bullet, he will increase the velocity but, to no where near 3900 FPS---He might just get 3400 FPS though.

Wonder what my 44" barrel chambered for the Tomahawk would give ??? Lets see, a 34" barrel is giving me 3200 with a 240 gr MK--another 10" of barrel should give me another 200 to 250 FPS.

Now my 44" barrel is going to be chambered for the Tomahawk for sure. Just a matter of time.

I use to read what some people were getting out of a LR cartridge and most times I would chamber it up and see for myself. The 6.5/300 Weatherby and the 7mm/300 Weatherby were two examples. Then came the 30/378 and 30/378 IMP and all the other 30 cal IMP cartridges plus the 338/416 ImP.
When I read where someone with only 85 grs of 4831 and a 250 gr 30 Cal bullet out of a 34" barrel making a claim of 3900 FPS, that throws up a RED flag right away.

I have learned long ago, don't believe everything you read in a publication.
Check the testing that was done and with what equipment they used.
3900 FPS from a 250 gr 30 cal bullet in a 416 size case using ONLY 85 gr of 4831 is "not" possible.

Later
DC

[ 07-04-2002: Message edited by: Darryl Cassel ]
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  #5  
Old 07-04-2002, 04:00 PM
 
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Re: 30 CODY EXPRESS

Darryl,
Sounds like a typo to me, as that combination might give 2900 fps, not the 3900 fps mentioned. Just a thought... CJ
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  #6  
Old 07-04-2002, 04:09 PM
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Re: 30 CODY EXPRESS

I had thought that, but it did say 3900 FPS.

If the book that Texas read said 3900 FPS the editor needs a spanking.

I can believe 2900 fps and if so, it's not very good velocity at all for a 250 gr bullet in that size case.

Long live the Tomahawk

DC
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Old 07-04-2002, 06:33 PM
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Re: 30 CODY EXPRESS

DC and CJ you both are right!!! I tracked down the gentleman from AK to TX and asked him about it. The editor needs a spanking [img]images/icons/grin.gif[/img] a typo on their part its suppose to be a 150gr sierra bullet at that speed. [img]images/icons/frown.gif[/img] . Works great on PD's out at 600 yds or better. This is why I call this home you guys (fight) believe in what you know not what you read always. Would have been nice don't you think?
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