.303-270 reloading

[john_1182]

i am trying to help out a friend with reloading his .303-270 and i have been unable to find out some information (as basic as it maybe) and hopefull some one here could help out.

1: basic but obvious, is the .303-270 firing the .227 projectile ?

2: what process is involved with resizing .303 brass to .303-270, i have read online that a full length .303-270 die will resize the brass correctly

3: when it comes to case length trimming what should the length be and what is the best way of trimming it length ? (type of trimmer)

i know these questions are fairly basic ones but ive spent the last 5hrs online and ive come up dry and thought it would be best to ask the experts before one of us blows our selves up..

once again thaks in advance SH, you all have helped out so much in the past...

 

[Jedi]

Re: .303-270 reloading

me thinks you have ass bakwardss
6-6.5x47
6.5x47 necked to 6mm
so
303-270
is 270 necked up to 303

SO the parent case is 270
if however the parent case is 303 then you have
270-303
303 case necked to 270

which is it??

 

[Hummer]

Re: .303-270 reloading

I believe he has the 270/303 which I think is one of the Epps conversions in Canada. Problem with them is the dies are extremely expensive (damn high) and there isn't much to be had in savings.

I believe you could run 303 case up in 7/308 die to take the neck down the first step and take it down in two stages.

You could also use 7MM Mauser FL die to take down neck.

I designed three new cartridges a number of years ago.
306 Confederate Sabre
7MM Confederate Sabre
6.5 Confederate Sabre
I could just as easily made a 270 Sabre.

The 306 Sabre has a 303 base/body diameter and is made by grinding down a 30.06 reamer base to .455"
at the 303 case length dimension leaving the shoulder same size and having 30.06 neck/throat.

When I thought of these the idea was to make a series of rounds that could be easily made and dies available cheap.

The 306 Sabre die was made my cutting off a 30.06 FL die .170" from the bottom. Same for seater. No reaming required.

You run 303 cases in this die until the cases shoulder setback will allow the bolt to close and fireform the case. The shoulder expands and increases case capacity 6 grains of propellant which increases velocity up to 30.06 range.

I made this up for Pattern 14 rifles and 303. The other plus factor is the round now headspaces on the shoulder.

The 7MM and 6.5mm are even easier to load. Unaltered 6.5X55 and 7MM Mauser dies load these two rounds. Shoulders are blown out to these dimensions as well.

I stress relieved the 303 brass about half way down the body to take the big expansion in stride and I did not lose a case in the deal.

Below is a normal 303 case and a fireformed 306 Confederate Sabre.

When the curator of the British Royal Armouries Museum Leeds found out about them he wrote me and asked me to send him dummy rounds for inclusion in their collection of 303 Variants.

 

[btm_54]

Re: .303-270 reloading

The 303-270 used to be very popular in Australia.
I think you can buy the dies from http://www.jansa.com.au/simplex.php
The reloading info from Nick Harveys reloading manual
http://www.amazon.com/Nick-Harveys-Practical-Reloading-Manual/dp/0964306808
Its been a while but to the best of my recollection my mate had one made from a smle 303.
I was 303 brass necked to .277 no trimming till the brass stretched.
I think he used AR 2208 powder ( Varget in US ) with 150 gr bullets.
It went well on hogs and roo's

 

[btm_54]

Re: .303-270 reloading

There is an Aussie forum where you would be able to check out guys who have reloaded 303-270.
http://www.australianhunting.net/
there will be somebody there who still "does it" or know a person who does.

 

[john_1182]

Re: .303-270 reloading

thanks everyone for the replies, sorry i was away with the better half over the weekend.

it is a .303 case necked down to .277 but as for any more info then that i am unsure as i dont have the rifle / cases on hand to get any measurments

as for the links thanks heaps, and i have some .303-270 dies online for $130 australian so thats not too bad.

once again thanks and if i have any more probs ill post back.