303-270

Reloading equipment, methods, load data, powder and projectile information.

303-270

Post by 6878mm » 16 Nov 2022, 6:52 am

Does anybody have a load for 303-270 using Win 760?
It is eq. to 2209
i have used it in place of 2209 in other loadings
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Re: 303-270

Post by No1_49er » 16 Nov 2022, 7:07 am

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Re: 303-270

Post by 6878mm » 16 Nov 2022, 7:08 am

Mate
did you read the post??
OR have you read ADI tables
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Re: 303-270

Post by No1_49er » 16 Nov 2022, 7:10 am

Might help us if you stated what projectiles you intended using
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Re: 303-270

Post by 6878mm » 16 Nov 2022, 7:46 am

Any loads , any projectiles
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Re: 303-270

Post by bladeracer » 16 Nov 2022, 1:23 pm

6878mm wrote:Does anybody have a load for 303-270 using Win 760?
It is eq. to 2209
i have used it in place of 2209 in other loadings


Are you looking for plinking, precision or hunting loads?

I had to use W748 in the .303 a few months ago and don't like it at all. W760 is listed also but more for 174gn bullets and heavier, not so much for lighter ones. It is a slower powder so may not be the best choice for the .270, but I'm sure you could make it work. I personally wouldn't bother using the ball Winchester stuff, just buy some AR2206H or AR2208. Readily available, not too expensive, very, very versatile, and easy to use. You may also find magnum primers ignite the ball powders better, it seems to have worked for us so far. Standard primers were just melting the powder.

If you really want to play with W760 it's also sold as H414 by Hodgdon in the US so look for that in load data.

The Gunboards forum might be a useful source for this sort of thing but I did a quick search and found nothing.

If you can get an early copy of Nick Harvey's book I'd be surprised if he didn't list loads for this.
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Re: 303-270

Post by Oldbloke » 16 Nov 2022, 1:39 pm

6878mm wrote:Mate
did you read the post??
OR have you read ADI tables


I find that statement perplexing.

No1 49er has directed you to the correct info. Id suggest you should read it.
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Re: 303-270

Post by 6878mm » 16 Nov 2022, 2:44 pm

I have read all that stuff, that is why I am on here
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Re: 303-270

Post by bladeracer » 16 Nov 2022, 2:51 pm

Oldbloke wrote:
6878mm wrote:Mate
did you read the post??
OR have you read ADI tables


I find that statement perplexing.

No1 49er has directed you to the correct info. Id suggest you should read it.


The ADI data helps him not all when he wants to use W760...
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Re: 303-270

Post by Oldbloke » 16 Nov 2022, 4:42 pm

6878mm wrote:I have read all that stuff, that is why I am on here



Yes, W760 is about same as AR2209.

Sooo,,, what don't you understand?
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Re: 303-270

Post by bladeracer » 16 Nov 2022, 4:44 pm

Oldbloke wrote:
6878mm wrote:I have read all that stuff, that is why I am on here



Yes, W760 is about same as AR2209.

Sooo,,, what don't you understand?


Same as me probably, what does ADI data have to do with his question?
"Does anybody have a load for 303-270 using Win 760?"
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Re: 303-270

Post by Oldbloke » 16 Nov 2022, 4:51 pm

bladeracer wrote:
Oldbloke wrote:
6878mm wrote:I have read all that stuff, that is why I am on here



Yes, W760 is about same as AR2209.

Sooo,,, what don't you understand?


Same as me probably, what does ADI data have to do with his question?
"Does anybody have a load for 303-270 using Win 760?"


Well he hinted that it was about the same as AR2209. He is correct. 303/270 using W760 data will be hard to find.

I would just load using the ADI data as a guide. Perhaps start 0.5 grains lower to provide a further safety margin.
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Re: 303-270

Post by bladeracer » 16 Nov 2022, 6:02 pm

Oldbloke wrote:Well he hinted that it was about the same as AR2209. He is correct. 303/270 using W760 data will be hard to find.

I would just load using the ADI data as a guide. Perhaps start 0.5 grains lower to provide a further safety margin.


Agreed, that's why I suggested finding older load data.
Also agreed, just load a light round, and shoot it, measure the velocity, adjust up or down to your requirements.
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Re: 303-270

Post by bladeracer » 16 Nov 2022, 7:02 pm

I had a look through my hard drives and found an article about the .303 Wildcats...in German :-)
Luckily I also had an English translation of it.
This may be entirely a hearsay story but the implication is that the .303-270 originally used standard .303 charges of cordite propellant. They simply pulled the military bullet, ran the charged case into a .270 neck die, and seated a .277" bullet back into it. Whether that continued into the smokeless era I have no idea. Considering the bullet is significantly lighter it is possible though.
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Re: 303-270

Post by bladeracer » 16 Nov 2022, 7:28 pm

6878mm check your private messages.
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Re: 303-270

Post by Peterwho » 16 Nov 2022, 8:10 pm

bladeracer wrote:I had a look through my hard drives and found an article about the .303 Wildcats...in German :-)
Luckily I also had an English translation of it.
This may be entirely a hearsay story but the implication is that the .303-270 originally used standard .303 charges of cordite propellant. They simply pulled the military bullet, ran the charged case into a .270 neck die, and seated a .277" bullet back into it. Whether that continued into the smokeless era I have no idea. Considering the bullet is significantly lighter it is possible though.


Blade racer,

You are absolutely correct. Not hearsay at all. I still have my dad’s 303-270 P14 with a sportco barrel, and a heap of ammo, including some still with cordite sticks. He came to Australia in the early 50s from Germany and was a roo shooter in the late 50s and early 60s in western nsw.

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Re: 303-270

Post by bladeracer » 16 Nov 2022, 8:26 pm

Peterwho wrote:Blade racer,

You are absolutely correct. Not hearsay at all. I still have my dad’s 303-270 P14 with a sportco barrel, and a heap of ammo, including some still with cordite sticks. He came to Australia in the early 50s from Germany and was a roo shooter in the late 50s and early 60s in western nsw.

Peter


Thanks Peter, it's nice to have that confirmed as it implies you could very likely use standard .303 load data. Do you know what bullet weights they would've been doing this with, I would assume 130gn? With the old Berdan brass they probably didn't care at all about brass life though, with modern boxer brass I would still load down from full-power .303 loads if you want the brass to last more than a few loads.

I've been trawling through my old manuals as I'm not finding any .303-270 data online and it would be good to put something online to help the next person that comes looking :-)
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Re: 303-270

Post by bladeracer » 16 Nov 2022, 9:04 pm

As it may well be viable to use standard .303 174gn load data for the .303-270 (probably 130gn bullets) I've been looking through some old manuals.

1967 Edition of Hornady's Handbook doesn't list W748 or W760 loads for the .303 at all. They do suggest the Hornady 150gn SP is the best bullet for hunting in the .303 out to 250yd.

The 1985 Edition does list W760 down to 150gn bullets (42.5gn up to 50.0gn max under the 150gn bullet), they also suggest loading short of these levels to increase brass life.
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Lee's Modern Reloading 2nd Edition 2009 lists W760 down to 125gn jacketed bullets in the .303 at 45.0gn up to 49.0gn max, 43.1gn up to 49.0gn max with 130gn bullets, 44.0gn to 48.0gn max with 150gn bullets - this is 2gn below the Hornady data.

Speer's 12th Edition 1995 for the .303 lists H760 down to 100gn bullets and notes you should use magnum primers with W748 and W760. Charges are 47.0gn up to 51.0gn max with 100gn and 125gn bullets, 44.0gn to 48.0gn with 150gn bullets.

Lyman's 44th 1967 for .303 doesn't list W760 either - apparently H414 didn't arrive until 1967, 760BR in 1968, and W760 not until 1973.

Lyman's 48th 2004 for .303 lists W760 down to 150gn bullets - 43.0gn up to 48.0gn max.

Interestingly Lyman's 1967 data for 174gn bullets on AR2206H/H4895 at 3.075" was 39gn making 2207fps up to 43gn max making 2469fps (with 42.5gn duplicating "factory" loads), but in 2004 is down to 37gn at 2032fps to 41gn at 2341fps at 2.945" - I'm running 38gn at 3.030" making 2300fps.

I have got an old Nick Harvey manual that I bought when I was chasing W748 .303 data but it came long after we started shooting it so I didn't need it, if I can find it, and it has any .303-270 data I'll add it here.
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Re: 303-270

Post by bladeracer » 25 Nov 2022, 2:27 pm

I found my old Nick Harvey manual, and he does list ".270/.303", but not with W760/H414. This is a first edition I think, 1980. I thought I had the same green manual I had when I was a kid, but I don't seem to.
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Re: 303-270

Post by animalpest » 25 Nov 2022, 2:40 pm

Yeah, I have Nick's first manual (green). It lists 748 but not 760
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