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RE: Development of PP loads for the .44-77.
Arnie,
As is often the case you are correct about fireforming with smokeless.
Part of this effort with the .44-77 is to experiment with all the different ways to get this round up and running. That's why I have explored other possible sources of brass and why I'll work with both bore diameter ppb and 2-D PPB with several nose designs. And why I'm looking at different fireforming options.
For fireforming I tried the smokeless with COW and it worked, sort of. I did some fireforming with black powder and ppb. That works very well, but is slow and requires all the cleanup with none of the fun of shooting black powder with accuracy.
So today I did as you have suggested. I dug up the lightest gg bullet I could find, 255 grain, then I sized them to .447", lubed them with my very good lube and loaded them over a published load of smokeless powder. That worked very well and went pretty fast with minimal cleanup afterward. I fireformed 100 cases using this method today and I feel it is the best way I have tried.
All the .44-77 cases I've fireformed have been annealed to about half way between the shoulder and the rim. They fireform very well.
Smokeless fireforming works very well with a bullet to give enough resistance to build pressure and fill the case out. One step at a time I will find what works best in my .44-77! What a journey this is going to be!
Thank you, Arnie, for your good advise on this. Keep 'em coming!
Jim Kluskens
aka Distant Thunder
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