1.710 in COL and will not cycle or chamber thru the action being too long.
So came up with a plan to load them in a .44 Special case which gives me a 1.550 COL compared to 240 gr. 44 Mag which is 1.600.
The measurement from bullet base to crimp groove is the same as the MB 240 gr. bullet.
Made up a dummy round and it cycles and chambers fine. Just need to work on the load data which I found using Alliant 2400 powder.
1000 FPS out of the rifle would be a modest goal if pressure stays within reason.
Of course I had one spare MB 300 gr. Hammer bullet left to make the test round so will order up some.
Will be an interesting test!

