Help with european components

[38Super]

Hi All

This could be the wrong place to ask but it can't hurt.

I want to put together a load for the Lee 7/8 slug for Target Shotgun and PSG.

Having tried a friend's load which worked fine in his gun, it was too tight in mine. It shot fine (semi-auto) but frequently didn't go fully into battery  causing light strikes. We have the same gun so we think my chamber is just that bit tighter.

I'm thinking of using either once fired Lyalvale Power Blue cases that I've already got or new Cheddite or Fioccchi primed. All straight walled I believe.

Lee load data from the slug mould manual suggests:-

Given that I would prefer to avoid filler if possible can anyone suggest a suitable european hull/powder/wad combination?

I'm only looking for around 1300-1350fps initially but accuracy is going to matter.

I believe I need a thin walled wad to avoid any bulges in the case and the gun seems to like 70mm cases.

I know it's a lot to ask but any thoughts or ideas would be much appreciated.

Cheers

Rob

[Guest cookoff013]

Just find different data. I have seen data with the lee slug and superspark. The powder was faster than all you have listed. Check out bpi data

[38Super]

I've got a pot of GM3 to hand and looking at the burn rate chart it could be good.

I've read about people using everything from Bullseye to Blue Dot???

 

Edited July 15, 2018 by 38Super

[Continental Shooter]

I'd try a slight increment of 0.05-0.1 g to see if it opens up. If your friends data is solid and tested you will only have a small, safe increase in pressure and speed which might help open up the pattern and give you more hitting power. Don't try if data is not known