Sam.
The .444 has a rim like a .45 colt very small thin rim and it don't take much to tear it off.
When I lubed the cases I pick up a hand full and roll them on the lube pad but the first one I picked up must not got into the lube when I rolled them on the pad. Usually when I pull a rim off it's no problem I just knock them out with a brass drift but this die I could not get the stem out so I had to drill and tap the shell head. My swage press had a 7/8X14 threaded ram that holds the die and I made up a bushing I can screw in the ram and screw the loading die into the press head and lower the ram this is usually a easy operation using the swage press but this time I had to put so much pressure on the press lowering the ram that I heard the bench top crack. That top is made up with a 2x12 with 5/8 plywood on top. You can hand on the lever with a cheater and it stays put.
Well I shot the new bullets today. I only had a can of IMR 4759 for a reduced smokeless load for the cast bullet and keep it in the velocity range I want so I started with a ladder load of 23 grains with the 285 gr bullet and worked it up to 28 gr and still no signs of pressure and very mild recoil from what I'm used to

but it does not take that bullet long to hit the berm.
The groups tightened up with every step of the ladder. the first three shots where 6 1/2" @ 130 yds using the barrel sights and the last three where 2 7/8".
The first three with a 23 gr load I saw a lot of wobble but it disappeared with 25 gr load.
That 285 gr bullet is .773" long and .432 in diameter. It will make a fine shooter I think when I get it worked out. It has a lot of bearing surface on the shank and it leaves just a trace of lead behind with all the rounds I shot.
I loaded 5 rounds using 2F KIK and shot the 5 through the action and it just might end up just shooting black fine group using it but the impact was 7" above the smokeless loads.
All in all to day this rifle went from not hitting all shots using a 210 gr bullet on a 30" paper to just under 3".
I call this making headway
Kurt