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I'll try to help. I shoot and load for a couple of 45/70's, almost all with cast bullets. I was beating myself up with stout loads when a buddy got me onto unique for rifle loads. He loaded Unique in his 45/90, and a couple of other older falling blocks. Since I started using unique I haven't looked back. Mild, pleasant recoil, low powder charges, and really not that far behind that of regular loads using 3031 and 4198. My favorite is 13.5 Gr of Unique under a 405hr Hallow base cast lead bullet. As for filler, Unique is not position sensitive and I cant discern any difference whatsoever when using unique. I've seen people use everything from cotton tuft, corn meal, tom cream of wheat.
Good luck.
A couple of thoughts. What about some of the fluffier powders such as Trail Boss? Probably no need for a filler then. What about .410 wads for a spacer. I've never read about this, it just popped into my head reading the OP.
I do recall reading that sometimes fillers raised pressures dramatically under certain conditions and by and large were abandoned by many of the old timers. I wouldn't count that last sentence as fact. But more as a reason to do some serious research.
Thanks stape that does help alot actually because i use unique for all my pistol loads but have never heard of it for 45-90.. and i already have 405 grain flat nose cast bullets, i dont think that will make to much of a difference...is that 13.5 grains of unique for 45-70 or 45/90..and if there any way you could see what other unique loads he has for 45-90, like what are the safe ranges for what grain bullests
I don't know what kind of barrel you have on that rifle but I would recommend you do a lot of reading before you try anything. Historically 45-90 was developed by Winchester and chambered almost exclusively in rifles that had softer barrels and used black powder. They cannot take today's higher pressure loads. I have been looking for loads for my 1886 Winchester 45-90 and almost all loads I have found have pressures exceeding recommended limits.There is very limited information that I have found and I don't want to ruin a $5000 rifle experimenting. While many modern smokeless powders like 5744 and trailboss sound attractive they have initial pressure spikes which can ruin an older black powder action. Have fun and be safe
Call IMR/Hodgdon and ask them for data for trailboss. I don't think pressure will be a issue with trailboss.I know what you mean..its not a original but its still only ment for black power so it cant handle crazy loads..im just looking for light target loads
Call IMR/Hodgdon and ask them for data for trailboss. I don't think pressure will be a issue with trailboss.
Talk to Goose