After much time googling and reading message boards and re-loading data books on re-loading info for the 450 Mag Express rimless cartridge I can,t find any data pertaining to this cartridge.
Can any of you point me to or suggest a good starting load.
Thanks.

Since there's no "450Mag Express" cartridge named or mentioned in anything I can research, can you come up with something a little more specific? I'm making a big assumption that if it's a rimless round that it may be the 450 Rigby or 450 Dakota? Both of these rounds are based on the 416 Rigby brass.

Thanks for the reply.
I am looking at the head stamp...450 Mag Express. No cartridge mfg logo or anything else.
This is for a large frame revolver made by North American arms back in the eighties...supposedly.
Like you, I can find no information on it.
Thanks again.

Pharlap,

Try singleactions.com, I believe Lee Martin has an article on it there.

Thanks Dan, that's exactly what I was looking for...and more. It seems like a good collectible gun except for the problem with the availability of the ammo...especially when you consider he traded a Glock for it.
Thanks again.

The .450 MAg Express was a brainchild of Dick Casull. The firearm was discontinued in 1984.

Current retail value for an unfired gun, in the presentation box and with all papers is around $1200. Value decreases rapidly down to $700 if the gun has been fired, or the box, or the papers are missing.

Last retail price was $650.

LOAD DATA

185 grain:
H4227 from 34.0 to 36.0
H110 from 38.0 to 40.0
HS-7 from 17.0 to 22.0
HS-6 from 14.0 to 19.0
HP38 from 9.0 to 15.0

200 grain
H4227 from 32.0 to 34.0
H110 from 36.0 to 38.0
HS-7 from 16.0 to 21.0
HS-6 from 13.0 to 18.0
HP38 from 8.0 to 14.0

225-230 grain
H4227 from 31.0 to 33.0
H110 from 32.0 to 34.0
HS-7 from 15.0 to 20.0
HS-6 from 13.0 to 17.0
HP38 from 8.5 to 12.0

250 grain
H4227 from 30.0 to 32.0
H110 from 31.0 to 33.0
HS-7 from 15.0 to 19.0
HS-6 from 12.0 to 16.0
HP38 from 9.0 to 11.5

260 grain
H4227 from 29.0 to 31.0
H110 from 30.0 to 32.0
HS-7 from 14.5 to 18.5
HS-6 from 12.0 to 15.5

Thanks for the update. With all of the great replies I've received you've covered all of our questions.
Thanks again,