I'd go with jacketed if I were you.  I've tried cast in a few matches, works great for the first string, then accuracy deteriorates from there.  My last attempt was an 80rd match with my K31.  By the time I got to the end of that match, I had a heck of time getting my brass brush down the bore and the yellow brass was silver by the time I was done.  I was using babbitt bullets, a bit harder and tougher than lino. I therefore came to the conclusion that there was a reason those cast bullet benchrest shooters were cleaning their small artillery pieces after each string.  The majority of them are lino shooters too.

That's one vote for Sierra.  I am of a similiar opinion.  Casting would be a new skill set and expense and I already have 85 percent of the tools needed for jacketed bullets.

Was sitting here going through the different bullet and powder sites for load data for 30-40 and other cartridges.  I don't recall having any 4350 in the "pile" so that will be on the list once I get back to the States.

Primers?  tens of pounds of WLR.  Powder? As stated. Brass?  Out the whazoo.  Bullets?  See: The whazoo.

Now I just have to get the 1895 from Turnbull's place and start working up loads. 

Shoot those sierra 220s with either 40.0 of 4350... or an appropriate load of the 3031. 

By the way...  GREAT NEWS!  Are you heading my way soon?  You can join me in some local matches to spruce up your trigger finger!  Looking forward to seeing you again bud!

Awesome!  Look forward to seeing you!!!

Ha!  Way ahead of you.  I have a couple of prototypes in my head.  The charger style would work if it was not a rimmed case so I am going a different direction.

That is true.  I have not seen a Russian Winchester up close  but I would think they modded the feed lips with cutouts for the rim to use the chargers.  Just a guess.

The CMP rules state the rifles must be as issued so I can not go with a charger style loading device.  Dang

I found a top view of a Russian here:  (You need to Login to view media files and links); I can see a modified parashooter design charger fitting right in there!  I don't know about the 30-40 feed lips, they'd about have to be similar to the Russians.  Here's a vid of Hickok loading 30-06, note he pushes the top round down with the head of the next round, then slides them back under the lips.  He may not be doing it right, those lips ought to expand a bit and one should be able to simply push a round down through them.  (You need to Login to view media files and links); If the 30-40 is like that, it's a major problem to overcome, but if they're like the Russian, you guys ought to be able to figure a way.  Here's an old illustration of the 95, it shows the rims stacked on top of each other, got to be a slot for those rims if that's the case or shorter rounds would be moving around, locking the rims.