Roundball showed me this in another thread, and it has been a very easy method of diagnosing some load performance issues.
IF #6 penetrated the tuna can without "dents" with my load at the same distance the pattern was satisfactory, I'd use that as more pellets increases the odds in my favor....if they didn't penetrate, then....
I'd see if 10 grains more of powder would penetrate to satisfaction and give a good pattern...if the pattern didn't work but the penetration was good...
Then I'd go back to the original load, and drop to #5 or #4 shot, check the pattern, then the penetration.
You have to find a balance of a good pattern to hit the bird, AND enough impact energy to get the pellets to kill the bird. Feathers on turkeys and geese act like a kevlar vest, so you have to hit the head usually, or go through that "vest"...easier (imho) to get the headshot to work on a turkey.
LD
IF #6 penetrated the tuna can without "dents" with my load at the same distance the pattern was satisfactory, I'd use that as more pellets increases the odds in my favor....if they didn't penetrate, then....
I'd see if 10 grains more of powder would penetrate to satisfaction and give a good pattern...if the pattern didn't work but the penetration was good...
Then I'd go back to the original load, and drop to #5 or #4 shot, check the pattern, then the penetration.
You have to find a balance of a good pattern to hit the bird, AND enough impact energy to get the pellets to kill the bird. Feathers on turkeys and geese act like a kevlar vest, so you have to hit the head usually, or go through that "vest"...easier (imho) to get the headshot to work on a turkey.
LD