I get plastic cases from Precision Reloading and Ballistic products,
in 12ga, 10 ga, and 8 ga for our 8GA FH.
The Nef and Savage are rifled. The 1887 is smooth. I have rifled barrels to
try later on a Mossberg 695, on a Mauser 12ga, and others.My two real big
big blasters, with my 700HE belted case have rifled. We get heavy rifled 12ga
blanks from Pacnor Barrels. As big as you want. The barrel on Savage is 1.5"
at breech. I use wads to take up space with faster powders. Don't want no
airspace. My slow powder(WC-860-RL25-etc) loads in long case in Savage
fill the case. My Savage is 23 lbs so it don't need a brake. Even with
max loads with 600gr over 3300 fps.The levergun and NEf
are 15lbs. We are getting 3.5" heavy base cases made at RMC to test
to see how high they can go and still extract. Top loads in long brass case
is in Rob's big Borchardt falling block action he built one on. 1000 gr at 3100.
The 12GA From Hell idea was his to start with and the Borchardt is designed
BMG size cases and BMG pressures. I limit Savage to 35,000 psi, limit NEF
to about 20,000, same for the 1887. The 600gr slug I use a lot and like very
much is a 600gr hardened Dixie slug. It is hard enough to take high
velocities.Here is picture of original Savage barrel and heavy one we used.
Below is 2 pics of different slugs we've shot.Ed