Thread: 303-25 reloading

Try the adi site for data. Should be some data there.

A quick look through the more common 25 cals suggests that the
25-35 is maxed out at 2300 fps with 117 grain bullets
The 250-3000 might get 2600 fps
Your 303-25 might safely do 2700 fps
And the 257 Roberts another 100 fps

All this based on 117 game bullets and not the lighter varmint ones

Annealing and forming from good quality 303 brass to 303-25 is very easy.
A lot easier than finding factory 303-25 brass

Do you know where to get your hands on a tool for doing this?

Originally Posted by akaroa1

Annealing and forming from good quality 303 brass to 303-25 is very easy.
A lot easier than finding factory 303-25 brass

Do you know where to get your hands on a tool to do this?

Originally Posted by Yeetziy

Do you know where to get your hands on a tool to do this?

@Yeetziy I have all the gear to do this

Anneal 303 brass
Form in 303-25 dies
Trim to length
Re anneal

It's pretty easy
Best done with good quality new brass
Or with fired modern low round count brass

Stay away from surplus military brass