| 400NitroExpress |
| (.400 member) |
| 01/08/07 07:32 AM |
Re: New Double Cartridge needed??
|
Quote:
I apologize for showing my ignorance--
Could one fire a 350 No.2 in a 400/350 Double? Are both 35 cal?
Yes, it would chamber and fire. Of course, it almost certainly wouldn't regulate worth a damn. The cases are identical. However, a .400/.350 cartridge probably would not chamber in an original .350 No. 2 rifle because the throat would likely be too short for the long 310 grain RN bullet. They use the same bullet diameter.
Quote:
Are their pressure limits different? What are the specific differences if any?
Yes.
.400/.350 2 3/4" Nitro Express: 43 Cordite/310 grain bullet = 16 tons BaseCUP for 2000 fps from 28" barrels.
.350 No. 2 Nitro Express: 51.5 grains Cordite (but usually loaded with NC)/225 grain bullet = 17.5 tons BaseCUP for 2550 fps from 28" barrels.
Current CIP MAP is 40,610 PSI for the .400/.350 and 47,862 PSI for the .350 No. 2.
The oddity with .350 No. 2 rifles is that, for some strange reason, almost all were marked as having been proved for the .400/.350 load (Cordite 43 - 310 MAX) instead of the No. 2 load.