Hello guys, anybody remembere my experience with the original 45-75 1876? http://www.cascity.com/forumhall/index.php/topic,24676.0.html
...so it's time to make some serious load and shoots.
I made some shoots by use of smokeless Vithavuori N133 powder.
The configuration of the shoots was identically in primer, brass and bullet, for every shoot, and these are:
magnum CCI primer, 300 grain bullet flat head,chaparral brass http://www.chaparralarms.com/specs/technicalspecs.htm
the only thing that I ganged was the amount of powder, by increasing the weight of this.
Here the shoots that I made:
1 magnum CCI primer, 300 grains bullet flat head, 27 grains Vithavuori N133;
2 magnum CCI primer, 300 grains bullet flat head, 30 grains Vithavuori N133;
3 magnum CCI primer, 300 grains bullet flat head, 35 grains Vithavuori N133;
4 magnum CCI primer, 300 grains bullet flat head, 40 grains Vithavuori N133;
5 magnum CCI primer, 300 grains bullet flat head, 45 grains Vithavuori N133;
I positioned a cilindrical steel empty gas tank that we in italy call "bombola" (the ones used in the home kitcens), at about 30 meeters. This is my empiric meter: If a hole it's made in this thing at this distance, you can kill someting like a Hog from Zero to about 70 metrs;
the first tree shoots was very powerless, no hole in the "bombola", no unburned powder and sounds like toys
the change happened when I overcam the weight of 39 grain in powder:
here a hole was made in one side and nothing in the other, no unburned, sounds good but not too much strong
4 was near the precedent, with some powder unburned
5 was the best result:
the shoot was very good, a hole in the first side and a hard dent in the other, but some amount of powder was unburned,more than the precedent shoot.
The rifle, that was ever positioned in a bracket for all the duration of the test to be safe, at the end, was "fresh" like a mountain rose, no weakenes, no meccanical yokes, nothing of nothing
This is the maximum load I ever used.
You can say that I'm crasy if I use, first smokeless and second this kind of load, but in real I used a simple empiric reasoning to be safe, that I show you for completeness
listen to me:
FFg or FFFg Black powder is more faster respect the N133 and it burns almost in totally when the bullet is near the point of start and the growing chamber (spaces between bullet and brass) is little, giving an higher start pressure than a slower rate and much progressive smokeless powder, altought smokeless have more strength than BP, but I don't have any kind of pressure mesure so the method I used is empiric and for correctness I can't tell that this is the real phisycs dynamics of the event, but it seems to be true;
after, this rifle was used for killing animals like grizzly bear and buffalo, that are mach stronger than a hog(this is story and Teddy Roosevelt teachs us),
so this rifle can support the power to do this, namely the sufficient load and the heavy bullets (I used the lighter one bullet to be safe);
So, if I start to make loads with a powder that has a slow burn rate respect Black powder (to be safe) and I stop wen I recognize that I can kill a hog (much weak than a buffalo or a grizzly, to be safe) , I'm soure that I'm still in safe.
So this was my thought that guided me to made this loads
So guys wat's about of you?
I think this was no dangerous, and effectively no damages was in the rifle, but I like to listen some free reflexion about, it's helpful to me,
so I'm gratefull if you all unleash yours thought