Anyone have one of these?
A .378Wby mag necked up to take .475 cal projectile. 400 grainers at 3200fps, 500 grainers develop 10,000ft/lbs + .(Frank Barnes)
Recoil reported to be a mild 90ft/lbs.

Does anyone make .475 cal projectiles?

Fascinated, like a moth to the zapper, I know it's going to hurt but it's just so pretty.....

I think the stated ballistics are incredibly overstated. The 470MBOGO is essentially the same as the 475 A&M with the belt removed and a sharper shoulder angle. Performance should be identical. You can launch a 500 gr .475 in excess of 2500fps with the MBOGO. You'd need to hit near 2900 fps to hit 10,000 ft-lbs of muzzel energy with a 500 gr. bullet. I really don't believe it can be done at 65,000 PSI.-Rob

Rob, thanks,
It looked pretty impressive...I took my figures from the 6th edition of Cartridges of the World. I've never corresponded with anyone who's owned or had any experience with these so I just had to ask.

The 470 Mbogo has a larger case capacity as well. The case measures 2.480 to the shoulder and has an OAL of 2.9450. There is .014 taper to the case body which means it is improved to the max for 416 Rigby brass.
470 Mbogo

The bullets for the 470 NE is actually .475, so they would work for the 475 A&M as well.

The ballistics for the 475 A&M have been overstated for years. The performance of this cartridge will be very similar to the 460 Wby.

Hunter - DownUnder,

Increasing the bore size from 458 to 475 and maintaining equal pressure and case capacity, would give about 50 ft/sec increase in velocity for the same bullet weight.

That would the 475 A&M and about 2650 f/s with 500 grain bullets and full pressure loads...7800 ft/lbs

Mike

Hunter - DownUnder,

We built a rifle based on the 416 Rigby case - essentially the same without the belt.

Here is our data for it.

475 Rigby Improved

We were not able to get the same ballistics advertised for it.

Who cares if it makes the balistics claimed, it should be loaded down anyway...It would then shoot the same as the best of them and at lower pressure...

I am sure it will kill anything that walks, talks, breaths or crawls under any circumstances, including the poor bastard that pulls the trigger.

I believe this is the original pre 470 Capstick..I think whoever designed the capstick just plagerized the 475...

I believe he meant taking the 0.475" 500 grain bullet to 2400fps. A metaphor.

Actually I misread the post and was referring to the 475 Magnum (Ackley) which is based on the 375 case...Sorry and thanks for the heads up...

The A & M registered in this old brain as Ackley as opposed to Atkinson and Marquette, strange as that may seem...but you can't pick your relitives!

Yea, I heard that Marquart guy was a bloody skebenga!

[ 09-23-2002, 21:56: Message edited by: Nickudu ]