Have a custom built Mauser chambered in 270 ICL out of Saturn Gun shop in Nevada. Verne Juenke's old shop.

I have no data for this round. I have dies, but don't know case length, or any loads for it.

Anyone have anything in their books?

Wendell:
P.O. Ackley has listings for several versions of the .270 ICL. One of them is the .270 ICL Magnum - pg. 169, Vol. 2.
The others are listed in Vol.1. The .277 ICL Flying saucer, pg. 379 and then there's the .270 ICL Jaguar listed on pg. 381.
Ackley mentions the magnum as being chambered by Juenke Saturn Inc. in Nevada. I'm assuming this is the rifle you have.
For the magnum version, Ackley lists the following loads:
110 gr bullet: Start - 66.5 gr. 4350 powder
= 3500 fps
Max. = 69.0 gr. 4350 = 3660 fps

130 gr. bullet: Start - 63.5 gr. 4350
= 3315 fps
Max. = 65.0 gr. 4350 = 3450 fps

130 gr. bullet - there is 1 listing for 4831 powder @ 3315 fps.

150 gr. bullet - Start = 62.0 gr. 4350,
= 3165 fps
Max. = 63 gr. 4350 powder
= 3250 fps

Also, Ackley says this cartridge is .264 WM case necked up to .270 with a minimum body taper and a 45 deg. shoulder.

Hope this helps some. As an experienced hand loader, I'm sure you know that Ackley's info is quite dated but I listed his loads as they are in the book.
Good luck.
Bear in Fairbanks

Edited to add: Ackley has no info as to case length for any of the 3 chambering's I listed above. Chamber cast needed?
B.I.F.

Coming out of P.O. Ackleys # 1 book....
Cases are made by firing factory loads in the ICL chamber. He lists the following loads.(use caution) 110gr bullet 4064 50-58 grs.
4350 62 grs...130 gr bullet,4350,59 grs. 4320,52-54 grs. 4831 65grs...150 gr bullet,4350,56-58 grs, 4831 62grs......
remember back when this was written there was only 1 4350 (IMR) same with 4064, & 4320, and 1 4831 (surplus) Hope this helps.

Thanks. I don't think this is the Magnum. I have PO Ackleys first book, but it doesn't show the ICL. It does show the ICL Jaguar. This round looks like the Jaguar, so I'll probably use the Jaguar load data, which is very similar to the 270 Win data, looks like 2 grains heavier.

The case is made by firing the 270 win in the rifle. S it has a bit more case capacity than the 270 win.

Interesting point on the fact that they had only one 4350 back then. If I use H4350 should I adjust down a grain or two to start? Would the data be for IMR 4350?

This rifle is unbelievably accurate. I have some ammo that Verne Juenke loaded for my dad. It has to be 40-50 years old. Still in the original Peters cardboard box.

I have 21 rounds left, while I hate to pull one, I might just do so to see what weight bullet it is shooting.

quote:

Originally posted by Wendell Reich:
Thanks. I don't think this is the Magnum. I have PO Ackleys first book, but it doesn't show the ICL. It does show the ICL Jaguar. This round looks like the Jaguar, so I'll probably use the Jaguar load data, which is very similar to the 270 Win data, looks like 2 grains heavier.

The case is made by firing the 270 win in the rifle. S it has a bit more case capacity than the 270 win.

Interesting point on the fact that they had only one 4350 back then. If I use H4350 should I adjust down a grain or two to start? Would the data be for IMR 4350?

This rifle is unbelievably accurate. I have some ammo that Verne Juenke loaded for my dad. It has to be 40-50 years old. Still in the original Peters cardboard box.

Wendell:
The powder would have been H-4350 and not IMR-4350. Yes, I'd start a couple of grains below the start and watch for pressure as I worked up signs. Good luck.
Bear in Fairbanks

quote:

Originally posted by Bear in Fairbanks:

quote:

Originally posted by Wendell Reich:
Thanks. I don't think this is the Magnum. I have PO Ackleys first book, but it doesn't show the ICL. It does show the ICL Jaguar. This round looks like the Jaguar, so I'll probably use the Jaguar load data, which is very similar to the 270 Win data, looks like 2 grains heavier.

The case is made by firing the 270 win in the rifle. S it has a bit more case capacity than the 270 win.

Interesting point on the fact that they had only one 4350 back then. If I use H4350 should I adjust down a grain or two to start? Would the data be for IMR 4350?

This rifle is unbelievably accurate. I have some ammo that Verne Juenke loaded for my dad. It has to be 40-50 years old. Still in the original Peters cardboard box.

Wendell:
The powder would have been H-4350 and not IMR-4350. Yes, I'd start a couple of grains below the start and watch for pressure as I worked up signs. Good luck.
Bear in Fairbanks

Bear,
Why do you say it would be H4350? On what basis?
Duponts' IMR 4350 was available long before H4350
Lyman's maneul printed in 1955 lists a lot of loads for IMR4350. Hodgdon's manuel printed in Sept, 1977, does not list H4350, but does list new MFG. H4831.B. E. Hodgdon writing in Ackley's handbook dated 1962, list Dupont IMR 4350 and in his list of "H" powders, there is no listing of H 4350.

I have to disagree with your statement that it would be H 4350. If it's not labeled as "H 4350" then I doubt it. And it the loads are not dated then it really throws to H 4350 statement in doubt.

If the ammo is 50 years old it cannot be H4350 as it was not yet available. 40 years ago well maybe, I didn't dig through enough books to see exactly when H4350 showed up on the market

Hodgdon introed H4350 in 1982.

Ok, so whether its H or IMR, is either 4350 a powder that will cause trouble if loaded 2 grains below the recommended start load?

We are talking 52 grains or so instead of 54. (150 gr Bullet)

africanhunteer:
Looking back, I think you're correct. I'll stand corrected on my comment.
Bear in Fairbanks