| lancaster |
| (.470 member) |
| 28/05/23 02:47 PM |
which 577 cartridge in this cape gun?
|
this cape gun is proofed for 90 grains cordite, 750 grains bullet
James & Reynolds, other barrel 12 ga
https://auctionet.com/de/2731835-kombi-james-reynolds-33391-se0327902/images#image_1
must be a 577 express but which would it be?
| kuduae |
| (.400 member) |
| 28/05/23 07:29 PM |
|
Re: which 577 cartridge in this cape gun?
|
.577 Nitro-Express 2 ¾“, see the 1925 Kynoch catalog:
| lancaster |
| (.470 member) |
| 28/05/23 09:21 PM |
|
Re: which 577 cartridge in this cape gun?
|
indeed
an interesting combination gun, think the 3" is the common version but it would be a handloading gun anyway
NitroX
|
| (.700 member) |
| 29/05/23 01:26 PM |
|
|
Re: which 577 cartridge in this cape gun?
|
Quote:
.577 Nitro-Express 2 ¾“, see the 1925 Kynoch catalog:
And I was going to say normally the 3" uses a 750 gr and the 2 3/4" a 650 gr and am instantly proven wrong.
Nice old hammer cape gun.
So Rolf Babnicks modern Greener Empire Cape gun conversion in 12-bore and .577 2 3/4" has some historical precedent. I always thought a 12b and the hefty .577 unlikely, unless one was pot shooting pheasant and wild cock in an Indian jungle where a tiger, gaur or rogue elephant might be stumbled onto. If ones gun bearer fled!
http://forums.nitroexpress.com/showflat.php?Cat=0&Number=6793&an=&page=1&vc=1
The choice of the .577 however was to fit better the large action of the 12-bore.
Back in 2004 I thought the price was high ... Now I wish ... Though it is just a cape gun.
| kuduae |
| (.400 member) |
| 29/05/23 09:19 PM |
|
Re: which 577 cartridge in this cape gun?
|
Quote:
And I was going to say normally the 3" uses a 750 gr and the 2 3/4" a 650 gr and am instantly proven wrong.
The 1925 Kynoch loads for the two .577 Express case lengths:
2 ¾”:
Nitro Express load: 90 gr smokeless, 750 gr jacketed bullet for 1795 fps ( 28” barrel)
Nitro for Black load: 75 gr smokeless, 570 gr metal based lead bullet for 1650 fps
Black P loads: 160 gr BP, 520 copper tubed or 560 gr solid lead bullet for 1725 / 1650 fps
3”:
Nitro Express load: 100 gr smokeless, 750 gr jacketed for 2050 fps
Nitro for Black loads: 75 gr smokeless, 570 gr or 650 gr solid or copper tubed metal based lead bullet for 1900 / 1850 fps
Black P loads: 167 gr black, 570 or 610 gr lead bullets for 1725 / 1650 fps
| 85lc |
| (.375 member) |
| 30/05/23 12:44 AM |
|
Re: which 577 cartridge in this cape gun?
|
Interesting that the resulting velocity of the two cartridges is so different.
NfB Each with 570 gr bullet and 75 gr smokeless:
2.75 = 1650 fps
3.00 = 1900 fps
Am I reading this wrong?
| lancaster |
| (.470 member) |
| 30/05/23 03:13 AM |
|
Re: which 577 cartridge in this cape gun?
|
no, you read right
| kuduae |
| (.400 member) |
| 30/05/23 05:05 AM |
|
Re: which 577 cartridge in this cape gun?
|
Quote:
Interesting that the resulting velocity of the two cartridges is so different.
NfB Each with 570 gr bullet and 75 gr smokeless:
2.75 = 1650 fps
3.00 = 1900 fps
Am I reading this wrong?
That's what the ballistic tables on pages 93 - 94 of the 1925 Kynoch catalog listed.
The ballistics given in a post1923 ICI / Kynoch catalog just add to the confusion:
|
NitroX
|
| (.700 member) |
| 30/05/23 03:32 PM |
|
|
|
Re: which 577 cartridge in this cape gun?
|
I believe Marrakai and Mickmuded a 650 gr in their .577 2 3/4" NfB Fatboy. I'm thinking the velocity was about 1800 fps in handloads? It will be on these forums somewhere.m