1st 45-70 handloads....


April 27, 2009, 11:58 AM
50gr, imr 4198, cci lr, r-p case,speer 350gr hot core jsp, (3) shot average ..2253 fps, 28" barreled 1885 hw.......:eek: these push on both ends, as the veins on my shoulder show it ...will work on my grouping next..as these "losend" my scope screws up...

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April 27, 2009, 12:27 PM
That Hi-Wall should take it if your shoulder can.

Note: The listed load is 10.0 over max for Marlin & Winchester lever-actions!


April 27, 2009, 07:06 PM
aren't 45/70's FUN to shoot! YEEEEHAAA!

April 27, 2009, 09:14 PM
Back off the load. Is your 1885 new/modern or vintage?

April 27, 2009, 09:22 PM
I shot my Marlin 1895CB yesterday for the first time. What fun!!

April 27, 2009, 11:35 PM
modern BROWNING 1990 something... No signs of pressure.. the book i have goes to 55 grs...:eek:

April 28, 2009, 11:38 AM
10% off max and ready to work for accuracy...if I remember right you're right about your velocity goal...good luck and have at it!

April 28, 2009, 12:08 PM
:uhoh: well that was to be my next.. ?... the bullets needs to be crimped in the bullet groove..(well at least a little bit).. so there is no moving the 'it" forward or back...i know i'm rite NEAR the rifling as ..in if i crimp on the bottem on the groove it leaves marks on the bullet.. so now i move the powder up / down to "GET HER RITE" ? i did the math on this round!!! over 3900 ft lbs !!:what::D

April 28, 2009, 12:12 PM
No reason atall to crimp for a single-shot rifle.

If you have good neck tension that's all you need.

You don't have a mag tube stack or recoil trying to move the bullet in a S/S.


Eric F
April 28, 2009, 01:00 PM
If you think 45-70 is fun step up to a 50-90!

I wonder how fast you can get a jacketed 400 gr to go?

April 28, 2009, 02:32 PM
Not as fast as you can get a 400 to go in a 45-70.

The 50-70 case is not as strong, and most replica rifles are not as strong as the 45-70 version of the same guns. (Bigger hole through the barrel shank threads, bigger case rim producing more locking block thrust, etc.)


April 28, 2009, 03:47 PM
Crimp or not to crimp in a S/S with the 45/70 Govt...

First off, RC is right. With proper and consistent neck tension you don't have to.

But with a non-bottleneck slightly tapered case like the 45/70 that I may have belled the mouth on a dash to seat a flat based bullet I would kiss it with a medium crimp.

Why? Because I've read a couple of articles mentioning more consistent load performance with a crimp using middling burn rate powders in the caliber. The supposition was that the extra slight delay of bullet release allowed for more full ignition of the charge before the bullet began it's trip down the barrel and the volume started increasing leading to a more consistent burn and performance from the powder.

I tried it out, playing with my crimp type with my standard cast loads and Rx7 and jacketed with H4198. Didn't try uncrimped as I use the caliber in lever actions and tube mags. My check out showed a light crimp had a lower avg. velocity and greater (~15%) standard deviation than those identical except for a medium or heavy crimp (which were nearly identical). So I use a medium crimp for my 45/70 rounds, I'll take all the consistency I can get.

atvalaska: Yeah, I meant to start playing with your powder charge and nail that thing down.

Eric F
April 28, 2009, 04:10 PM
Not as fast as you can get a 400 to go in a 45-70.

oops sorry for the confusion I ment a 400 gr 45-70.

Yes the 50-70 and 50-90 just wont hold up to high pressure loads.

April 28, 2009, 04:22 PM
more load testing well have to hold off till i heal from these last rounds,,i did make a copy cat load with imr 3031 using a compressed 53gr charge..50fps faster and pushed me back harder:eek:.. and they were tounching the rifling to much that they would not come out with the action.:mad:..untill the round was fired!.. a couple of them i fired before i stopped...will pull the bullets and try something new....:rolleyes:

Eric F
April 28, 2009, 05:17 PM
using a compressed 53gr charge how bulky is this powder? Or did you use some sort of filler? Seems like 53 grains of anything would not fill that much space.

April 28, 2009, 05:28 PM
2 me it looks like 4198... the 4198 @ 50gr is "rite' there at the bottem of the round

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