45-70 velocity?

[Old Jim]

Some folks say their 45-70s are about on par with the 45-90s, velocity-wise.
#1. Can anyone expand on this subject?
#2. How accurate are your loads over the LR, 800 yds +.
#3. What brand of powder and about how much is used?
#4. Bullet mold used and alloy, ie. 20:1 or?
#5. Primer used?
#6. Sizing of cases?
#7. PP or GG?
#8. Rifle maker and barrel length/twist?

Probally forgot some, but that'l get you started,

Jim

[Lumpy Grits]

Jim, my .45-70 is a 34" hvy. bbl. Shiloh, Hartford and my .45-90 is a 30" hvy. bbl. Shiloh, #1 Sporter.
The '90 runs about 105 fps faster than the '70 using the same PJ #45001 bullet(30:1). I load both with 3F Goex. CCI br2 primer.
The '70 gets R-P brass(annealed each loading)and the '90 sees Starline that is also annealed each loading. Both get FL sized.
Hope this helps,
Gary

[Opencountry]

Jim,

My 45-70 Sporter #1 is made by Shiloh and has a 1:18" twist 30" heavy barrel. I'm currently working up a gg load using Swiss 1.5, 63 grains looks very promising. In fact, the last lot of Swiss 1.5 showed 63 grains to be the cat's meow in this caliber. I cast a .459" dia. 529 grain PJ Postell at 16:1. The nose of the bullet is .449" dia. Use DGL as lube and wipe between shots. I use a .060" John Walters' vegi-fiber over-the-powder wad and a .004" under-the-bullet wad, both stuffed into the case after powder compression. I never chronographed this load but I'm guessing it was somewhere near 1,200 fps. I use Federal 150 Match LP primers with a .004" thick under the primer wad. My bullet has .002" neck tension in FL-sized Remingtom brass cases. Regarding accuracy I have a number of targets with all shots through the same hole at 100 yards. I have yet to try this load at 600 yards, but have been told by an experienced shooter that this volume/weight of Swiss 1.5 will do well at that range.

Regards,
Robert