Testing some loads for my 45-75

[larryo_1]

Well I was able to go through 4 different loads this morning before the weather got nasty again.  For those who might be interested, here are the results:  The air temp was a brisk +35 degrees and it was overcast and sort of breezy for the moment.  I was using 50-90 Sharps cases that were reformed to 45-75 and CCI 200 primers.
Load #1 was with 75grains of Fg GOEX and the Buf Arms 350 grain bullet with SPG lube.  In fact, all 4 loads were with this bullet and the CCI primer.    The average velocity was 1495.5 fps.  The SD was 24.8 fps and the CV was 1.7%

Load #2 was with 56.0 grains of Pyrodex CTG.  The average velocity was 1370.0 fps.  The SD  was 9.3 fps and the CV was 0.7%

Load #3 was with 72.0 grains of FFg Goex. The average velocity was 1489.9 fps.  The SD was 51.4 fps and the CV was 3.7%.

Load #4 was with 26.0 grains of 4759.  the average velocity was 1400.0 fps.  The SD was 51.4 fps and the CV was 3.7%.

I still have 4 more test loads to try.  I already have a couple of loads that I am comfortable with but I still like to mess around and try different recipies out.  Besides, I enjoy playing with that big toy.  When I am really, really comfortable with one particular load, I will go get some venison this coming fall.  i still have one test load with Swiss #1.5 to try.  From what you all have been saying, that is a good BP to try out.

The Chronograph that I use is a PACT Professional series.  The screens were set at 6 feet from the muzzle and all the shots were fired at 50 yards.  None were all that great but the one with the 4759 was the best.

[.45colt.]

larryo-1,Wow thanks for posting these results. tho I don't have a '76 yet I have folowed these rifles for more than three years now,and have been waiting for things to work out with the Uberti's. Somewhere I saw a picture of an original box of Winchester 45/75 ammo that had reloading instructions on it using 1Fg.  And now by Your results I see that it gave the best velocity,something that was doubted when I asked the poster about the original ammo as He said that the powder scale was different back then. Jim.

[larryo_1]

.45 Colt:
Thanks for the feedback.  Am still working on another set of loads when the weather will let me.  I got my '76 last summer and have been having lots of fun with it.  It is a Uberti Cimerron rifle.  Had to rework the trigger a bit as it was pretty hard.  Also scraped off that Italian varnilsh and redid the stock to suit me.  Now I gots a really pretty rifle and a damn good shooter.  Love to play with different loads and somewhere I will find that perfect load.  I use fire-formed 348 brass and reformed 50-90 Sharps brass and am waiting for some of those Starline 45-75 brass to become available.  I DID not have good luck with Bertram and the price is way too high for the quality.

[john boy]

None were all that great but the one with the 4759 was the best.

Larry, may want to try some 23gr XMP5744 and the Lee 340 bullet
... 50 yards
... 100 yards

... plain patch- 200 and X patches - 300 yards

[larryo_1]

   John Boy:

Yep!  That is one of the next batch of loads that I got loaded up but with the Buf Arms bullet.  If that works okay, I got some Lyman 330 HP's and some 457192's to try also.  Just having fun with the big Boomer.  That is when the weather lets me!