I like timb99's answer! I consistently get 1.25-1.26 grns from high quality 7 1/2 s. A big key though is the sizing. If truly 7.5, I get what timb99 says! For example, I recently went through a 15 bag order with same lot number of 8's! Bag after bag they ranged .94-.96! Glad I am anal, as these were really 8.5s! Tom Rhoads
Sorry Mikie, but you are full of crap! See above on very accurate wt of 7.5 which is typically 1.25 grns of true high antimony shot! 8's are consistently 1.1 area and 8.5s run .93-.95! Have a nice day! Tom Rhoads
The weight of a size 7-1/2 which is .095 was taken out of the Lyman number 5 Edition for pellets with 2% Antimony. The assumption of the pellet being round is correct. If Antimony is lighter but harder the size 7-1/2 with more Antimony should weigh less.
BTW Size 8's are listed at 1.1 with 2% Antimony and 8-1/2's run .09. These are weights, not sizes.
What would a single 7-1/2 pellet weigh with 6% Antimony. Or do you agree with timb99?
This gives new meaning to the arguments regarding 7.5's vs. 8's vs. 8.5's vs. 9's!!!
The next question is how much energy does each flake of powder have and what is the effect if a powder drop varies but 1 or more flakes and, if there is an effect, how do you measure it and what do you have to do to achive consistent velocities.
I'm not trolling, it's the mix for the percentage of Antimony in shot making. My pellets normally run between 1.3 and 1.1, which is in the range for 2 to around 6% Antimony. I didn't know the formula to figure it out.
I just received some military spec lead, it measures .095 for a size 7-1/2 but weighs .8. The same as a size 9 should weigh with 2% Antimony. It's not anything I'm used to, but it's really hard and shiny.