I have read as much as I can on these of late and hate to have to ask but....
Been playing with a new to me martini cadet in 310.
Bit of a dark bore but it seems to shoot ok. Sort of.
I made some cases out of 32-20 brass and a CBE paint coated heeled bullet was a nice tight fit in neck.
They shot OK to good considering.
A bit of a leading issue but not bad.
I flared some Bertrum 310 cases and they shot excellent considering how they were made to fit into the new brass.
So there I am all good and dandy.
All groups shot at 50 yrds
Attachment 199834
Tried some fixed ammo with a wrap of paper around the heel to make them fit in the now expanded cases.
Patterns at best ...some leading.
The bullets heels are loosy goosy in the case necks now.
So off I tried breach seating with a plugged case and the CBE heeled bullets.
Better but still leading issues....some groups some splatterings.
Even with lube
So I tried some pp'ed 308241 150 gn unsized cast bullet wrapped so as to make a long nose riding bullet.
Works a treat.
Attachment 199835
Not complaining at all.....but
I can't get fixed ammo to shoot.
Obviously the gun is up to it.
What have I done wrong then???