Thread: 303 reloading

Ok I'm going to be controversial here on this subject...if your mk2 is in good nick nothing wrong with full length sizing. 303 dies were hard to come by a just a few years back, couldn't find any neck size dies, set of RCBS was all I could find from Gunworks.

Anyway I tried partially sizing with F/L die, was a pain so just F/L sized as I do with other cartridges. I've had no trouble whatsoever. My PPU is probably up to 5 firings, but mainly using Greek as does look heavier, probably simular 5x plus no issues.

This neck sizing I think is for flogged out 3'O's. If its a good one just load it like any other rifle

Originally Posted by jackson21

Ok I'm going to be controversial here on this subject...if your mk2 is in good nick nothing wrong with full length sizing. 303 dies were hard to come by a just a few years back, couldn't find any neck size dies, set of RCBS was all I could find from Gunworks.

Anyway I tried partially sizing with F/L die, was a pain so just F/L sized as I do with other cartridges. I've had no trouble whatsoever. My PPU is probably up to 5 firings, but mainly using Greek as does look heavier, probably simular 5x plus no issues.

This neck sizing I think is for flogged out 3'O's. If its a good one just load it like any other rifle

15 x reloads on ppu brass, neck sizing only. Previously unfired no4 mk2.

Neck sizing generally results on longer brass life. Need to full length size if switching the brass between rifles, or when the brass starts to harden and you don't anneal.

I don't blame you for giving up trying to neck size with a full length die, what an embuggarance!