Could anyone with some 470 bullets handy give me some measurements? I'd like to get projectile's OAL and distance from base to cannalure of as many brands/styles/weights as possible. I'm modeling a cartidge and would also like to get second opinions from somebody running Load from a Disk or Quickload or other software to compare results.

Thanks,

DOC

[QUOTE]Originally posted by DOC
Hi Doc,
I have some measurements for you:
All bullets are 500 grains
Swift A-Frame OAL 1.2745
Base to center of Canalure .6345
Woodleigh soft OAL 1.2480
Base to center of canalure .6335
Woodleigh Solid OAL 1.3450
Base to center of canalure .7335
Hawk soft OAL 1.2545
Hawk has no canalure
Barnes X bullet OAL 1.5560
Base to center of canalure .7195
Barnes solid OAL 1.4575
Base to center of canalure .6680

I hope this helps you. I also have load from a disk. What sort of cartridge are you looking into? 470 Mbogo

Barnes 500 gr XLC

1.570" OAL

0.710" Base to Center of Cannelure

Mbogo,
I am one of the several people interested in a smaller rimmed .475 cartridge. Right now I'm looking a 470 N.E. velocity out of a necked down 50-110 Win. case when loaded to suitable pressures in a Ruger No.1. The reason for using this case is that reloading dies for this cartridge will also form a .475 Alaskan which will work well when combined with the Marlin 1895 and .475" revolver bullets, or versions adapted for the 1886/Model 71 Winchester using either rifle or revolver bullets and the full lenght high pressure round for the T/C Encore and Ruger. I am interested in the round mainly for use in the No.1, but I may have a line on a M71 at a good price. I say a post titled 475 Alaskan here a few weeks ago. If I decide to go ahead and could split the development up between 3 people of so, cost would be reduced and data could be shared.

Would you be so kind to run some numbers for me?

I estimate effective case capacity at 85 grains of water with the bulet seated to the base of a .475" neck. I also included used .2 degree body taper and 17 degree shoulder in my estimate. Case length would be 2.375 and OAL would vary with bullet.

Would you be so kind as to get run this cartridge using the Woodleigh soft at 37500-50000psi. with proper powders? I don't know how load from a disk works. If it is too much to ask, please say so.

Thank for your help!

DOC

[QUOTE]Originally posted by DOC:
Hi Doc,
Sounds like an interesting project. I have some numbers for you based on a 24 inch barrel.The case capacity is the capacity after the bullet is seated.

Case Capacity 85.481 grains of water
Caliber .475
Bullet Weight 500 grains
Barrel length to base of bullet 22.285
Sectional Density .317
Volume ratio 12.5

Powder Class: Medium Fast
Load Data:
powder type: BLC2, AS-22, RX12, AA2460, N203, AR2206, N135
Load density Charge weight Velocity Press
% grains fps PSI
75 64.1 1700 32,100
80 68.4 1800 36,500
85 72.7 1900 41,300
90 76.9 2100 46,200*
95 81.2 2200 51,500*
100 85.5 2300 57,100*
* high pressures reference only

Alternate loads:
Powders: IMR4064, H380, AA2520, N140

Load Density Charge Weight Velocity Press
% grains fps PSI
75 64.1 1700 30,800
80 68.4 1800 35,100
85 72.7 1900 39,600
90 76.9 2000 44,400
95 81.2 2100 49,500*
100 85.5 2200 54,800*
*high pressure reference only

Doc this is from Load from a Disk.
I would start low and work up carefully. I hope this helps you out. 470 Mbogo

Hi Doc,
If there is any confusion with way the information posted, it should read in colums. The first colum should be load density in %, second is chare weight in grains,the third is velocity in fps and the fourth is pressure in PSI. Have fun with it. 470 Mbogo