429 Ultra Express

[junkman1967]

30-06 case trimmed to 1.85 inches, 240g JHP 44mag (.429 dia) COL of 2.220. Will be shot out of a rifle built on a Axis action with an 16.5 0r 18 inch barrel.

http://i245.photobucket.com/albums/gg66/Cowboys_2008/Guns/429UltraExpress.jpg

[bootsmcguire]

No matter how many times I see this, I like more every time.

[junkman1967]

Thanks. I pick up the rifle on Tuesday I'm going to do some testing with a new magazine before I tear the rife down. After that the fun begins. The compete buid is over at weapons guild and I will post here in the axis based section :-)

[M.O.A.]

wow whats the vel. going to be at do you think.

that might be what i need to deer hunt with but i would have to cut it down to 1.80 to be ok here

[junkman1967]

I've been working on load data to push it around 2000fps Max 2500

[M.O.A.]

2500 would be better ;-}

[junkman1967]

IS there a length restriction where you live?

[358Hammer]

Just a shade longer than the 445 Super mag @ 1.6 . Was this idea with a specific purpose in mind?

Neal

[junkman1967]

Well I have always wanted a 44 mag rifle but didnt want a 444 marlin or a standard 44 mag. I was sitting around sifting through some brass and came across a few -06 cases (I dont have an -06 rifle) So I sawed the neck off and came up with the 1.85 dimension and then flared it with a 44 mag die and popped a bullet in it seated to 2.220 (I liked the round number. I would like to hunt hogs or other medium sized game with it. It is more or less a why not? kinda thing for me, as I love to tinker. I picked the Savage action for its ease of head spacing, now I just have to make a custom reamer and go from there with testing.

[M.O.A.]

IS there a length restriction where you live?
yap 1.8 and .35 cal. for rifles its a dumb rule they came up with here i indiana but you can shoot any thing over a 243 if its in a pistol get that one

[junkman1967]

LOL. Somehow I dont think this would make a good pistol round.

[M.O.A.]

oh no i want it in a 20" encore rifle ;-} all though i have shoot some crazy pistols

[junkman1967]

I bet we could come up with a compliant version of this for your state :)

[Grit #1]

Not much to headspace on with this cartridge. The 444 marlin has the rim to headspace on, this round only has the case mouth and that is not much. I would opt for the .444.
Good luck with it in any event.
Best regards,
Grit

[M.O.A.]

yes this is true i wonder if any one has done this with a belted case that would bet something i would say

[junkman1967]

I have loaded a few dummies and it should head space fine of the case mouth with the slight crimp I have on it. I will have to keep cases consistent length I built a special mandrel for my trimmer to get them within 1thou and carefully finish by hand.

[LabRat2k3]

yes this is true i wonder if any one has done this with a belted case that would bet something i would say

Sure have, either the 458x2 American or 450 Marlin, both are short, big bore rounds that headspace off of a belt.

[bootsmcguire]

I had wondered about building something very similar to this on a 240 Weatherby case at one time. It would be belted and could run on a standard 308/30-06 sized bolt face and probably even magazines. Only real issue I think would be availability of brass, or at least cost.

[BTSniper]

Cool concept, basicaly a super 44 automag pistol round. I do the same thing to 30-06 brass to make my 44amp brass except it is cut at 1.30" then I have to ream the neck. I wonder if you will have to ream the neck too?

Good shooting

BT

[bootsmcguire]

Any developement with this project yet?