Gents:
I'm new here and I'll try to post with a photo to experiment a bit.
Anyway, it's interesting to see a double rifle change its target grouping as the powder charge changes. Most vintage double can be made to shoot well by playing with the load--either the powder type, powder charge, bullet weight, bullet style--or all four.
A mate bought a .577-500 double from me a short while ago and came to my home to shoot it for the first time. He did the shooting and I recommended the load. We began light with 45 grains of IMR 4198, moved to 50 grains and finished at 55 grains. The bullet was the standard for nitro for black loading of 440 grains.
The three targets are here. Low velocity will see a double shoot apart, and you can see that in the first target of 45 grains of powder. As the powder charge increases thereby increasing velocity, the pattern improves. Too fast a velocity, say if we went to 60 grains and the double will cross fire.
Anyway, let's see if this works.
Cheers,
Cal
PS. I offer to you double rifle men my website <calpappas.com> to see lots of double rifle information.
I'm new here and I'll try to post with a photo to experiment a bit.
Anyway, it's interesting to see a double rifle change its target grouping as the powder charge changes. Most vintage double can be made to shoot well by playing with the load--either the powder type, powder charge, bullet weight, bullet style--or all four.
A mate bought a .577-500 double from me a short while ago and came to my home to shoot it for the first time. He did the shooting and I recommended the load. We began light with 45 grains of IMR 4198, moved to 50 grains and finished at 55 grains. The bullet was the standard for nitro for black loading of 440 grains.
The three targets are here. Low velocity will see a double shoot apart, and you can see that in the first target of 45 grains of powder. As the powder charge increases thereby increasing velocity, the pattern improves. Too fast a velocity, say if we went to 60 grains and the double will cross fire.
Anyway, let's see if this works.
Cheers,
Cal
PS. I offer to you double rifle men my website <calpappas.com> to see lots of double rifle information.