New bullet

[Don McDowell]

Jim 17 twist in the 44's is about right I think.
That 434470 bullet is just a touch over 1.35. cast from 16-1 it tips the scales at 469 and 474 from 20-1. In my 44-77 I was running it and the Brooks 470 gr postel grease groove right on top of 1300. Both bullets shoot well in that 19 twist to 800 beyond that it can and will give you very low scores on paper. Steel in might keep you in the running, but as we know there's a ton of difference between an x on the score card in steel and paper matches.
The 17 twist shoots the 1.35 bullets very well. I have no idea about the velocity, but I would guess a bit over 1300. 82 grs OE 1 1/2 with the grease groove variety and 84 with the patched, in Jamison 45-90 cases sized to 44-90 straight.
I need to get the new 44-77 Shiloh out and give it a good run here with the 1.3 inch bullet to just what it can do, but seems way to many things in the have to list, to be able to dig into the want to list as much as I would like.
I believe the ODG's had a fair handle on twist and bullet length but I don't think they ever got a complete handle on it, but they did keep increasing case length to gain velocity, but stayed with bullets just a touch to long for the 18 and 20 twists common by the time the Creedmoor era ended. Given a few more years I'm betting some rifle crank somewhere was going to build a 16 twist in the 45's and a whole new level of scores would open up. As it were we had to wait another 100 years to apply to the blackpowder cartridges what they started figuring out in the new fangled small bore smokeless. Want a longer heavy bullet to shoot well, the twist needs to speed up.